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| Performance and Maintainance of Windows Vista A forum for performance and maintenance tasks in Windows Vista. (microsoft.public.windows.vista.performance_maintainance) |
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August 8th 09, 08:15 AM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Hello!
explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima 
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August 8th 09, 08:38 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
"Dima" wrote in message
... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima .. How do you know that a codec is causing the problem? I'm also seeing heavy use of explorer.exe at times when I open any directory with a large number of files, even when none of them are videos. Robert Miles
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August 8th 09, 08:52 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Thanks Robert for replying!
People in groups and in forums write that this is because a codec tries to decode a media in the folder. Why does explorer.exe uses 90% of CPU Intel E6750 (RAM 6 gb) for a minute after opening a folder with many files or scrolling the file list or selecting a file in the folder? Regards, Dima "Robert Miles" wrote: "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima .. How do you know that a codec is causing the problem? I'm also seeing heavy use of explorer.exe at times when I open any directory with a large number of files, even when none of them are videos. Robert Miles
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August 8th 09, 09:43 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
I wish I knew - it might help me solve some of the problems
I've had recently. Robert Miles "Dima" wrote in message ... Thanks Robert for replying! People in groups and in forums write that this is because a codec tries to decode a media in the folder. Why does explorer.exe uses 90% of CPU Intel E6750 (RAM 6 gb) for a minute after opening a folder with many files or scrolling the file list or selecting a file in the folder? Regards, Dima "Robert Miles" wrote: "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima .. How do you know that a codec is causing the problem? I'm also seeing heavy use of explorer.exe at times when I open any directory with a large number of files, even when none of them are videos. Robert Miles
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August 10th 09, 01:54 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Hello!
I stopped Windows Search service and in 6 hours explorer.exe stopped using 90% of CPU after opening an HDD in a Windows explorer window. Other account in my Windows do not have this problem at all. How to prevent explorer.exe from using 90% of CPU? Regards, Dima "Robert Miles" wrote: I wish I knew - it might help me solve some of the problems I've had recently. Robert Miles "Dima" wrote in message ... Thanks Robert for replying! People in groups and in forums write that this is because a codec tries to decode a media in the folder. Why does explorer.exe uses 90% of CPU Intel E6750 (RAM 6 gb) for a minute after opening a folder with many files or scrolling the file list or selecting a file in the folder? Regards, Dima "Robert Miles" wrote: "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima .. How do you know that a codec is causing the problem? I'm also seeing heavy use of explorer.exe at times when I open any directory with a large number of files, even when none of them are videos. Robert Miles
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August 12th 09, 12:18 AM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Hi, Dima:
I personally use Process Explorer's Thread tab (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify which thread in Explorer.exe is consuming 90-100% of CPU. If you double-click Explorer.exe, go to the Thread tab and double-click the thread that is consuming the most CPU, you'll see its stack, and probably one of the functions in that stack will be located in a codec file (.ax file). In some cases, after disabling the codec the problem will reproduce again with another codec involved. In that case, the probably culprit is a damaged video file. Of course, it's possible that the problem is NOT caused by a codec or a damaged video file. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima
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August 12th 09, 04:20 AM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Thanks Daniel for your reply!
Stack for thread 3528 46% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!ScrollDC+0x6e USER32.dll!IsWindow+0xdb USER32.dll!MsgWaitForMultipleObjectsEx+0x2e USER32.dll!MsgWaitForMultipleObjects+0x20 BROWSEUI.dll!DllGetClassObject+0x339c BROWSEUI.dll!DllGetClassObject+0x3321 BROWSEUI.dll!DllGetClassObject+0x3246 BROWSEUI.dll!DllGetClassObject+0x3417 SHLWAPI.dll!StrCmpIW+0x37 ntdll.dll!RtlDeleteElementGenericTableAvl+0x282 ntdll.dll!RtlRealSuccessor+0x4c0 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 Stack for thread 3980 47% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!CallWindowProcW+0xca USER32.dll!GetPropW+0x39 comctl32.dll!DefSubclassProc+0xec USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d SHDOCVW.dll!Ordinal198+0x175 SHDOCVW.dll!Ordinal153+0x1e11 SHDOCVW.dll!Ordinal174+0x410 SHDOCVW.dll!Ordinal174+0x3b6 SHDOCVW.dll!Ordinal153+0x1c7b SHDOCVW.dll!Ordinal153+0x1c1e SHDOCVW.dll!Ordinal153+0x13dc SHELL32.dll!Ordinal258+0x3b4c2 SHELL32.dll!Ordinal184+0x871c DUser.dll!DetachWndProc+0x323 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d comctl32.dll!Ordinal342+0x129f comctl32.dll!InitCommonControls+0x3ecd1 comctl32.dll!InitCommonControls+0x3f1c6 comctl32.dll!InitCommonControls+0x40791 comctl32.dll!InitCommonControls+0x40a85 comctl32.dll!TaskDialog+0x295c4 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!CallWindowProcW+0xa0 USER32.dll!CallWindowProcW+0x18 comctl32.dll!CreateUpDownControl+0x250d comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x642 comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x80d SHDOCVW.dll!DllCanUnloadNow+0x72a comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x185 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!ReleaseDC+0x93 USER32.dll!CharPrevW+0xa5 ntdll.dll!KiUserCallbackDispatcher+0x1f USER32.dll!EndPaint+0x1a USER32.dll!EndPaint+0x2c BROWSEUI.dll!Ordinal126+0x262e BROWSEUI.dll!Ordinal126+0x6308 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 I do not see .ax. What functions in the stacks use the CPU? Regards, Dima "Daniel MartÃ*n [MVP]" wrote: Hi, Dima: I personally use Process Explorer's Thread tab (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify which thread in Explorer.exe is consuming 90-100% of CPU. If you double-click Explorer.exe, go to the Thread tab and double-click the thread that is consuming the most CPU, you'll see its stack, and probably one of the functions in that stack will be located in a codec file (.ax file). In some cases, after disabling the codec the problem will reproduce again with another codec involved. In that case, the probably culprit is a damaged video file. Of course, it's possible that the problem is NOT caused by a codec or a damaged video file. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima
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August 12th 09, 09:41 AM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
[Follow-up set to microsoft.public.windows.vista.general]
It doesn't seem that a codec is causing your problem. To see the real function names, you need to configure Process Explorer to point to the Microsoft Symbol Server. Basically, what you need to do is install Debugging Tools for Windows from http://www.microsoft.com/whdc/devtoo...g/default.mspx and then open Process Explorer, Options, Configure Symbols. Fill in that dialog box using this screenshot as a template: http://www.hanselman.com/blog/conten...bolprocexp.png When the problem reproduces again, repeat the steps I mentioned in my previous post. Now Process Explorer will be able to display more meaningful stacks. How is the system behaving when you start your computer in Safe Mode? To boot in Safe Mode, press F8 before the Vista loading logo appears and select "Safe Mode" from the menu. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Thanks Daniel for your reply! Stack for thread 3528 46% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!ScrollDC+0x6e USER32.dll!IsWindow+0xdb USER32.dll!MsgWaitForMultipleObjectsEx+0x2e USER32.dll!MsgWaitForMultipleObjects+0x20 BROWSEUI.dll!DllGetClassObject+0x339c BROWSEUI.dll!DllGetClassObject+0x3321 BROWSEUI.dll!DllGetClassObject+0x3246 BROWSEUI.dll!DllGetClassObject+0x3417 SHLWAPI.dll!StrCmpIW+0x37 ntdll.dll!RtlDeleteElementGenericTableAvl+0x282 ntdll.dll!RtlRealSuccessor+0x4c0 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 Stack for thread 3980 47% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!CallWindowProcW+0xca USER32.dll!GetPropW+0x39 comctl32.dll!DefSubclassProc+0xec USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d SHDOCVW.dll!Ordinal198+0x175 SHDOCVW.dll!Ordinal153+0x1e11 SHDOCVW.dll!Ordinal174+0x410 SHDOCVW.dll!Ordinal174+0x3b6 SHDOCVW.dll!Ordinal153+0x1c7b SHDOCVW.dll!Ordinal153+0x1c1e SHDOCVW.dll!Ordinal153+0x13dc SHELL32.dll!Ordinal258+0x3b4c2 SHELL32.dll!Ordinal184+0x871c DUser.dll!DetachWndProc+0x323 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d comctl32.dll!Ordinal342+0x129f comctl32.dll!InitCommonControls+0x3ecd1 comctl32.dll!InitCommonControls+0x3f1c6 comctl32.dll!InitCommonControls+0x40791 comctl32.dll!InitCommonControls+0x40a85 comctl32.dll!TaskDialog+0x295c4 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!CallWindowProcW+0xa0 USER32.dll!CallWindowProcW+0x18 comctl32.dll!CreateUpDownControl+0x250d comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x642 comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x80d SHDOCVW.dll!DllCanUnloadNow+0x72a comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x185 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!ReleaseDC+0x93 USER32.dll!CharPrevW+0xa5 ntdll.dll!KiUserCallbackDispatcher+0x1f USER32.dll!EndPaint+0x1a USER32.dll!EndPaint+0x2c BROWSEUI.dll!Ordinal126+0x262e BROWSEUI.dll!Ordinal126+0x6308 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 I do not see .ax. What functions in the stacks use the CPU? Regards, Dima "Daniel MartÃ*n [MVP]" wrote: Hi, Dima: I personally use Process Explorer's Thread tab (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify which thread in Explorer.exe is consuming 90-100% of CPU. If you double-click Explorer.exe, go to the Thread tab and double-click the thread that is consuming the most CPU, you'll see its stack, and probably one of the functions in that stack will be located in a codec file (.ax file). In some cases, after disabling the codec the problem will reproduce again with another codec involved. In that case, the probably culprit is a damaged video file. Of course, it's possible that the problem is NOT caused by a codec or a damaged video file. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima
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August 12th 09, 08:45 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Thanks Daniel for your instructions!
There is no the problem when I start my computer in Safe Mode. The problem reappears when I start my computer in Diagnostic startup mode and in Selective startup with "Load system services" and "Load startup items" unchecked. The "Group Policy Client" service starts in the Diagnostic startup and in Selective startup modes with "Load system services" and "Load startup items" unchecked. Its imposible to stop the "Group Policy Client" service or disable it. I installed Debugging Tools for Windows x64 from http://www.microsoft.com/whdc/devtoo...g/default.mspx and then opened Process Explorer, Options, Configure Symbols. Filled C:\Program Files\Debugging Tools for Windows (x64)\dbghelp.dll srv*c:\symbols*http://msdl.microsoft.com/download/symbols in that dialog box. Stack for thread 3132: 48% CPU usage ntoskrnl.exe!KiSwapContext+0x7f ntoskrnl.exe!KiInitialPCR+0x7f0 ntdll.dll!ZwClose+0xa kernel32.dll!CloseHandle+0x3e SHLWAPI.dll!CFileStream::Release+0x66 SHELL32.dll!CShellLink::_LoadFromFile+0x175 SHELL32.dll!CShellLink::Load+0x2d SHELL32.dll!_AndLoadFromFile+0x48 SHELL32.dll!SHCoCreateInstanceAndLoadFromFile+0x52 SHELL32.dll!CFolderShortcut::_GetTargetPath+0x7c SHELL32.dll!CFolderShortcut::_LoadShortcut+0x3d SHELL32.dll!InitializeFileHandlerWithFile+0x7e SHELL32.dll!CFileSysItemString::HandlerCreateInsta nce+0x1cf SHELL32.dll!CFileSysItemString::LoadHandler+0xcb SHELL32.dll!CFSFolder::_BindHandler+0x1c4 SHELL32.dll!CFSFolder::GetUIObjectOf+0x2a SHELL32.dll!CRegFolder::GetUIObjectOf+0xe7 SHDOCVW.dll!SHGetNavigateTarget+0x83 SHDOCVW.dll!GetLinkInfoHelper+0x98 SHDOCVW.dll!CNscIconTask::_Extract+0xfa SHDOCVW.dll!CNscOverlayTask::InternalResumeRT+0x3b SHDOCVW.dll!CRunnableTask::Run+0xd0 BROWSEUI.dll!CShellTaskThread::ThreadProc+0x2c7 BROWSEUI.dll!CShellTaskThread::s_ThreadProc+0x33 SHLWAPI.dll!ExecuteWorkItemThreadProc+0xf ntdll.dll!RtlpTpWorkCallback+0xf2 ntdll.dll!TppWorkerThread+0x3d6 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x1d Stack for thread 2160: 45% CPU usage ntoskrnl.exe!KiSwapContext+0x7f USER32.dll!ZwUserGetProp+0xa USER32.dll!GetPropW+0x46 comctl32.dll!MasterSubclassProc+0x48 USER32.dll!UserCallWinProcCheckWow+0x1ad USER32.dll!SendMessageWorker+0x64a USER32.dll!SendMessageW+0x5b SHDOCVW.dll!CNscTree::_CacheParentShellFolder+0x45 SHDOCVW.dll!CNscTree::_ShellItemForTreeItem+0x24 SHDOCVW.dll!CNscTree::_OnCDNotify+0xc9 SHDOCVW.dll!CNscTree::_OnNotify+0x556 SHDOCVW.dll!CNscTree::OnWinEvent+0x75 SHELL32.dll!CProperTreeHost::OnMessage+0xc4 SHELL32.dll!DirectUI::HWNDHost::_CtrlWndProc+0xa1 DUser.dll!WndBridge::RawWndProc+0x9a USER32.dll!UserCallWinProcCheckWow+0x1ad USER32.dll!SendMessageWorker+0x64a USER32.dll!SendMessageW+0x5b comctl32.dll!CCSendNotify+0xf93 comctl32.dll!TV_DrawItem+0x396 comctl32.dll!TV_DrawTree+0x1fd comctl32.dll!TV_Paint+0x1d9 comctl32.dll!TV_WndProc+0x98c USER32.dll!UserCallWinProcCheckWow+0x1ad USER32.dll!CallWindowProcAorW+0xdb USER32.dll!CallWindowProcW+0x18 comctl32.dll!CallOriginalWndProc+0x1d comctl32.dll!CallNextSubclassProc+0x8d comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DefSubclassProc+0x56 SHDOCVW.dll!CNotifySubclassWndProc::s_SubclassWndP roc+0xeb comctl32.dll!CallNextSubclassProc+0x8d comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DefSubclassProc+0x56 SHDOCVW.dll!CNscTree::_SubClassTreeWndProc+0x3e9 SHDOCVW.dll!CNscTree::s_SubClassTreeWndProc+0x5a comctl32.dll!CallNextSubclassProc+0x8d comctl32.dll!MasterSubclassProc+0xe1 USER32.dll!UserCallWinProcCheckWow+0x1ad USER32.dll!DispatchClientMessage+0xc3 USER32.dll!_fnDWORD+0x2d ntdll.dll!KiUserCallbackDispatcherContinue USER32.dll!ZwUserDispatchMessage+0xa USER32.dll!DispatchMessageWorker+0x52d BROWSEUI.dll!CBrowserFrame::FrameMessagePump+0x26d BROWSEUI.dll!BrowserNewThreadProc+0xb4 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x1d Previously, Stack for thread 3424: 50% CPU usage ntoskrnl.exe!KiSwapContext+0x7f ntoskrnl.exe!KiSwapThread+0x13a ntoskrnl.exe!KeWaitForSingleObject+0x2cb ntoskrnl.exe!KiSuspendThread+0x29 ntoskrnl.exe!KiDeliverApc+0x2d7 ntoskrnl.exe!KiCheckForKernelApcDelivery+0x25 ntoskrnl.exe!CmpParseKey+0xb3e ntoskrnl.exe!ObpLookupObjectName+0x593 ntoskrnl.exe!ObOpenObjectByName+0x2f2 ntoskrnl.exe!CmOpenKey+0x25d ntoskrnl.exe!KiSystemServiceCopyEnd+0x13 ntdll.dll!ZwOpenKey+0xa ADVAPI32.dll!BaseRegOpenClassKeyFromLocation+0x1cc ADVAPI32.dll!BaseRegOpenClassKey+0xc1 ADVAPI32.dll!LocalBaseRegOpenKey+0x17a ADVAPI32.dll!RegOpenKeyExInternalW+0x1f2 ADVAPI32.dll!RegOpenKeyExW+0x19 SHLWAPI.dll!SHRegGetCLSIDKey+0x103 SHELL32.dll!SHOpenShellFolderKey+0x38 SHELL32.dll!CFSFolder::GetAttributesOf+0x479 SHELL32.dll!CRegFolder::_AttributesOf+0x74 SHELL32.dll!CRegFolder::GetAttributesOf+0xe6 SHDOCVW.dll!SHGetNavigateTarget+0x4d SHDOCVW.dll!GetLinkInfoHelper+0x98 SHDOCVW.dll!CNscIconTask::_Extract+0xfa SHDOCVW.dll!CNscOverlayTask::InternalResumeRT+0x3b SHDOCVW.dll!CRunnableTask::Run+0xd0 BROWSEUI.dll!CShellTaskThread::ThreadProc+0x2c7 BROWSEUI.dll!CShellTaskThread::s_ThreadProc+0x33 SHLWAPI.dll!ExecuteWorkItemThreadProc+0xf ntdll.dll!RtlpTpWorkCallback+0xf2 ntdll.dll!TppWorkerThread+0x3d6 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x1d Regards, Dima "Daniel MartÃ*n [MVP]" wrote: [Follow-up set to microsoft.public.windows.vista.general] It doesn't seem that a codec is causing your problem. To see the real function names, you need to configure Process Explorer to point to the Microsoft Symbol Server. Basically, what you need to do is install Debugging Tools for Windows from http://www.microsoft.com/whdc/devtoo...g/default.mspx and then open Process Explorer, Options, Configure Symbols. Fill in that dialog box using this screenshot as a template: http://www.hanselman.com/blog/conten...bolprocexp.png When the problem reproduces again, repeat the steps I mentioned in my previous post. Now Process Explorer will be able to display more meaningful stacks. How is the system behaving when you start your computer in Safe Mode? To boot in Safe Mode, press F8 before the Vista loading logo appears and select "Safe Mode" from the menu. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Thanks Daniel for your reply! Stack for thread 3528 46% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!ScrollDC+0x6e USER32.dll!IsWindow+0xdb USER32.dll!MsgWaitForMultipleObjectsEx+0x2e USER32.dll!MsgWaitForMultipleObjects+0x20 BROWSEUI.dll!DllGetClassObject+0x339c BROWSEUI.dll!DllGetClassObject+0x3321 BROWSEUI.dll!DllGetClassObject+0x3246 BROWSEUI.dll!DllGetClassObject+0x3417 SHLWAPI.dll!StrCmpIW+0x37 ntdll.dll!RtlDeleteElementGenericTableAvl+0x282 ntdll.dll!RtlRealSuccessor+0x4c0 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 Stack for thread 3980 47% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!CallWindowProcW+0xca USER32.dll!GetPropW+0x39 comctl32.dll!DefSubclassProc+0xec USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d SHDOCVW.dll!Ordinal198+0x175 SHDOCVW.dll!Ordinal153+0x1e11 SHDOCVW.dll!Ordinal174+0x410 SHDOCVW.dll!Ordinal174+0x3b6 SHDOCVW.dll!Ordinal153+0x1c7b SHDOCVW.dll!Ordinal153+0x1c1e SHDOCVW.dll!Ordinal153+0x13dc SHELL32.dll!Ordinal258+0x3b4c2 SHELL32.dll!Ordinal184+0x871c DUser.dll!DetachWndProc+0x323 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d comctl32.dll!Ordinal342+0x129f comctl32.dll!InitCommonControls+0x3ecd1 comctl32.dll!InitCommonControls+0x3f1c6 comctl32.dll!InitCommonControls+0x40791 comctl32.dll!InitCommonControls+0x40a85 comctl32.dll!TaskDialog+0x295c4 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!CallWindowProcW+0xa0 USER32.dll!CallWindowProcW+0x18 comctl32.dll!CreateUpDownControl+0x250d comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x642 comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x80d SHDOCVW.dll!DllCanUnloadNow+0x72a comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x185 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!ReleaseDC+0x93 USER32.dll!CharPrevW+0xa5 ntdll.dll!KiUserCallbackDispatcher+0x1f USER32.dll!EndPaint+0x1a USER32.dll!EndPaint+0x2c BROWSEUI.dll!Ordinal126+0x262e BROWSEUI.dll!Ordinal126+0x6308 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 I do not see .ax. What functions in the stacks use the CPU? Regards, Dima "Daniel MartÃ*n [MVP]" wrote: Hi, Dima: I personally use Process Explorer's Thread tab (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify which thread in Explorer.exe is consuming 90-100% of CPU. If you double-click Explorer.exe, go to the Thread tab and double-click the thread that is consuming the most CPU, you'll see its stack, and probably one of the functions in that stack will be located in a codec file (.ax file). In some cases, after disabling the codec the problem will reproduce again with another codec involved. In that case, the probably culprit is a damaged video file. Of course, it's possible that the problem is NOT caused by a codec or a damaged video file. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima
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August 13th 09, 07:12 PM
posted to microsoft.public.windows.vista.music_pictures_video,microsoft.public.windows.vista.performance_maintenance,microsoft.public.windows.vista.general
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What codec makes explorer.exe load CPU?
Dear Daniel,
Checking "Safe boot" (with any of its sub-options) on "Boot" tab with "Normal startup" on "General" tab in msconfig prevents explorer.exe CPU usage! There is no the left pannel (folder tree) in Window explorer in this mode. Minimizing the Window explorer window stops the explorer.exe CPU usage in the "Normal startup" mode too. What is causing the problem then? Regards, Dima "Daniel MartÃ*n [MVP]" wrote: [Follow-up set to microsoft.public.windows.vista.general] It doesn't seem that a codec is causing your problem. To see the real function names, you need to configure Process Explorer to point to the Microsoft Symbol Server. Basically, what you need to do is install Debugging Tools for Windows from http://www.microsoft.com/whdc/devtoo...g/default.mspx and then open Process Explorer, Options, Configure Symbols. Fill in that dialog box using this screenshot as a template: http://www.hanselman.com/blog/conten...bolprocexp.png When the problem reproduces again, repeat the steps I mentioned in my previous post. Now Process Explorer will be able to display more meaningful stacks. How is the system behaving when you start your computer in Safe Mode? To boot in Safe Mode, press F8 before the Vista loading logo appears and select "Safe Mode" from the menu. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Thanks Daniel for your reply! Stack for thread 3528 46% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!ScrollDC+0x6e USER32.dll!IsWindow+0xdb USER32.dll!MsgWaitForMultipleObjectsEx+0x2e USER32.dll!MsgWaitForMultipleObjects+0x20 BROWSEUI.dll!DllGetClassObject+0x339c BROWSEUI.dll!DllGetClassObject+0x3321 BROWSEUI.dll!DllGetClassObject+0x3246 BROWSEUI.dll!DllGetClassObject+0x3417 SHLWAPI.dll!StrCmpIW+0x37 ntdll.dll!RtlDeleteElementGenericTableAvl+0x282 ntdll.dll!RtlRealSuccessor+0x4c0 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 Stack for thread 3980 47% CPU ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7 USER32.dll!CallWindowProcW+0xca USER32.dll!GetPropW+0x39 comctl32.dll!DefSubclassProc+0xec USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d SHDOCVW.dll!Ordinal198+0x175 SHDOCVW.dll!Ordinal153+0x1e11 SHDOCVW.dll!Ordinal174+0x410 SHDOCVW.dll!Ordinal174+0x3b6 SHDOCVW.dll!Ordinal153+0x1c7b SHDOCVW.dll!Ordinal153+0x1c1e SHDOCVW.dll!Ordinal153+0x13dc SHELL32.dll!Ordinal258+0x3b4c2 SHELL32.dll!Ordinal184+0x871c DUser.dll!DetachWndProc+0x323 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!GetWindowThreadProcessId+0x275 USER32.dll!SendMessageW+0x5d comctl32.dll!Ordinal342+0x129f comctl32.dll!InitCommonControls+0x3ecd1 comctl32.dll!InitCommonControls+0x3f1c6 comctl32.dll!InitCommonControls+0x40791 comctl32.dll!InitCommonControls+0x40a85 comctl32.dll!TaskDialog+0x295c4 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!CallWindowProcW+0xa0 USER32.dll!CallWindowProcW+0x18 comctl32.dll!CreateUpDownControl+0x250d comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x642 comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x7c SHDOCVW.dll!DllCanUnloadNow+0x5a2 SHDOCVW.dll!DllCanUnloadNow+0x80d SHDOCVW.dll!DllCanUnloadNow+0x72a comctl32.dll!DefSubclassProc+0x2e5 comctl32.dll!DefSubclassProc+0x185 USER32.dll!GetWindowLongPtrW+0x176 USER32.dll!ReleaseDC+0x93 USER32.dll!CharPrevW+0xa5 ntdll.dll!KiUserCallbackDispatcher+0x1f USER32.dll!EndPaint+0x1a USER32.dll!EndPaint+0x2c BROWSEUI.dll!Ordinal126+0x262e BROWSEUI.dll!Ordinal126+0x6308 kernel32.dll!BaseThreadInitThunk+0xd ntdll.dll!RtlUserThreadStart+0x21 I do not see .ax. What functions in the stacks use the CPU? Regards, Dima "Daniel MartÃ*n [MVP]" wrote: Hi, Dima: I personally use Process Explorer's Thread tab (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify which thread in Explorer.exe is consuming 90-100% of CPU. If you double-click Explorer.exe, go to the Thread tab and double-click the thread that is consuming the most CPU, you'll see its stack, and probably one of the functions in that stack will be located in a codec file (.ax file). In some cases, after disabling the codec the problem will reproduce again with another codec involved. In that case, the probably culprit is a damaged video file. Of course, it's possible that the problem is NOT caused by a codec or a damaged video file. -- Regards/Saludos, Daniel MartÃ*n Microsoft MVP Windows Desktop Experience "Dima" wrote in message ... Hello! explorer.exe uses 90% of CPU for a minute when I open a folder with movies or scroll the list of the files. The view mode is the list. The thumbnails are not shown. How to know what codec makes explorer.exe use 90% of CPU? I uninstalled Divx Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a uninstaller for it. I do not see any other codecs. VLC Player is installed. Regards, Dima
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