Information Systems



Boot problems with Windows 7 or lower classpnp.sys

I replaced a motherboard with a seemingly exactly the same model and Windows 7 wouldn't boot. It hung and then restarted in safe mode at:

/windows/system32/drivers/classpnp.sys

Not that it was system32 even though the OS was 64 bit. The way it was solved was to switch the SATA option to legacy IDE instead of AHCI in bios setup. Not that sometimes there are 2 settings for this, not just one.