A friend urgently called me over last night as his PC had died, his motherboard config went wonky so when he booted up he'd get 'ATAPI Invalid' errors and it wasn't recognizing his drives, CD or HDD. I tried getting into the BIOS unsuccessfully, it would just hang and never make it in. So we pulled out the manual and cleared the CMOS via the jumper, powered back up and all was good. I don't know what could have caused this problem in the first place? Is it a sign of more problems to come or maybe just some bad luck on his part? Never seen a situation like that (of course I've screwed up my CMOS settings many times before, but all as a result of my tinkering, never had a spontaneous change like that).