On Jun 9, 7:20*pm, "
wrote:
It appears from many websites that people have managed to get extended
desktop display working with both Vista 32 and Vista 64 so I guess the
question becomes what might prevent extended mode from working in
Vista with an X1900?

I just uninstalled CCC version 9.3 and installed the most recent
version, version 10.2 in my 64-bit Vista. Everything worked just fine
(screen 1 and screen 2 showed up in the screen display box and I was
able to extend the main screen onto the second monitor). Then I
rebooted and now I'm back to the same thing--I can clone but not
extend and "screen 2" doesn't appear in the screen display box.