C++ errors are usually caused by software or driver issues.
Maybe it's a program that you have running. Maybe it's the
new device or driver that you installed on your system. If you
recently installed printer drivers, chipset drivers(VIA especially),
or a new video card this could be the cause of your problem.
So, if you set your BIOS to 4X or 8X AGP recently or installed
new software or hardware, that should be your very first suspect.