I've set up a boot disk and an autoexec.bat with the bios on, but about 3 or 4 seconds after accessing the floppy drive, the PC shuts off. I've tries different boot disks - still the same. It starts to read the disk, but then BAM - off again.
What can I do? I've tried tresetting the CMOS - no difference.
Have I completely messed it up?