Jan 222009  This is a more of an information to workaround a
system crash issue in Windows 7 Beta. In Windows 7 Beta your
computer may fail to respond or crash when trying to run
winsat.exe which is nothing but running “Rate and improve your
computers performance” or changing multi-monitor configurations
or during a DVD or Video playback.  This could happen if your
system is installed with the XDDM driver for your Video. XDDM
stands for “XP Device Driver Model”. To resolve this problem,
find the appropriate WDDM driver (Windows Display Driver Model)
or a VGA driver.  This is clearly mentioned in the release notes
for Windows 7 beta as a known issue.  Incoming search terms:   
One Response to “XDDM driver can crash your Windows 7 beta
system”    1. Yes, it’s true that Windows 7 beta 7000 (64-bit)
always crashes when watching HD TV channels and watching DVD.
I’m using the latest Catelyst 9.3 version driver and using ATI
4550 display card.      It’s really annoying! Hope MS can fix it
soon.   Leave a Reply