|Bios settings may have been erased or changed when played with the system. Might disable acpi in bios.|
You can make a copy of the floppy and put it on a cd or even a usb flash. Some support linux boots also but rare. Might even look at openbios but that would be the very last choice.
My question might be why it now shows up? Did the system come with this OS installed?
It think there was some other post about this a few weeks ago.
"Best Practices", Event viewer, host file, perfmon, are in my top 10