I'm having the usual classpnp.sys problems after a motherboard replacement (due to the Intel Sandy Bridge issue with failing SATA ports). Basically the thing goes into a loop where none of the F8 menu options results in a boot.
The strange thing is that it does occasionally boot. I mean very occasionally, maybe 1 in 30 tries. But recently it's literally not even been that reliable.
I tried reinstalling from the Windows 7 CD, but now running that causes a reboot too.
The motherboard is a Gigabyte P67A-UD4 B3 (which is the 3rd rev of the board, I originally had a P67A-UD4.
My only guess is that I should make an Ubuntu disk and see if I can replace the classpnp.sys file from another Windows 7 disk.
I'm trying desperately not to have to reinstall the whole OS, because I've got a lot of stuff installed.
Any idea what classpnp.sys actually does? Or if there's another way to fix the boot?