I'm headed back to the ill computer.I pulled the CMOS battery in HOPES the BIOS will reset itself.
Now yer on the right track.
I would have first measured the voltage drop in circuit, would be willing to bet the cmos battery is very low, couldn't get the thing to boot properly.
Sometimes pulling it like that and letting it rest, it will get some sort of Surface Charge, but even if it does boot the machine afterwards, good idea to at least check the voltage level in-circuit, or just replace the cmos bat.
The malware, which is on the hard drive, could not have kept it from going through boot or into bios, but the install may have put a bit of excess drain on the cmos battery, which is likely old and gettin' a little weak anyway. When the voltage crosses the threshold where it cannot power the chip, she daid.
--Mac