Dual Boot problem --- very odd

[Phil_C]

After booting into a different OS (dual boot Win 7 on hard drive, or a WinPE CD), returning to WinXP causes the video driver to be unable to load. A subsequent reboot into XP fixes the problem. This behavior is 100% repeatable.

I don't understand how this can happen, since shutting down the computer should mean the next boot starts with a clean slate. How can a previous OS cause a problem?

BTW, it's nice to see this forum is still here...

[Harryc]

Try disabling switchable graphics in BIOS. Neither OS you are running supports it.
http://www-307.ibm.com/pc/support/site. ... R-70495#g5

[Phil_C]

I had the BIOS set to Discrete Graphics, but had not paid attention to "OS detection of switchable graphics". That did the trick.

Thanks much.