You can uninstall SP1 and see if the problem still exists -

How to uninstall Windows Vista SP1 as a troubleshooting step
http://support.microsoft.com/kb/948537

Also -
Unlimited installation and compatibility support for Vista SP1 is available at
no charge through 18 Mar-09
• US:
http://support.microsoft.com/oas/def...4&gprid=500921
• CA:
http://support.microsoft.com/oas/def...4&gprid=500921
• UK:
http://support.microsoft.com/oas/def...4&gprid=500921
• AU:
http://support.microsoft.com/oas/def...4&gprid=500921
• Other: http://support.microsoft.com/oas/default.aspx
| select Windows Vista | select Windows Vista Service Pack 1


--

TaurArian [MVP] 2005-2008 - Update Services
http://taurarian.mvps.org
======================================
How to ask a question: http://support.microsoft.com/kb/555375
Computer Maintenance: Acronis / Diskeeper / Paragon / Raxco


"Adrian Miller" wrote in message
...
| Hi,
|
| since last week I cannot should down my PC any more. It hangs for hours in
| the shut shown state. Is there any way to troubleshoot this?
|
| Thanks
| Adrian
|
| --
| Adrian Miller
|
|