go to boot up.. get a msg "bios not installed" - continues to boot up Windows XP.. Windows boots up.. 10 seconds into looking at windows get a pop-up msg (too fast to read it) "computer just recovered from something" then boots up again - endless loop

i've tried latest bios updates.. nothing, same thing happens
if its a virus, i havent time to do anything from windows.. the re boot is too fast..

Have you tried setting your BIOS back to default settings ?
do this and see if it helps

there are numerous reasons for this but give it a ago and post us a message back on this site

Jase