The Millennium Bug Toolkit kept restarting Windows. Why?
Probably your boot sequence in the CMOS settings. Most machines will try to boot from the A: drive before looking at the C: drive. However this can be altered so that it starts at the C: drive. In that case, despite the fact that you have a bootable Millennium Bug Toolkit in your A: drive, the C: drive will start first, and the machine will run from that. Simply change your CMOS settings. (And remember to set them back later if you wish).