Trying to remove virus but can't disable SATA in BIOS

Removing the battery should've reset the CMOS password. How long did you pull the battery for? You can check your manual, some boards have a jumper to reset the CMOS. Either method should remove the password though.

What kind of problems did you have when trying to install windows from the OS disc?

Have you tried running a virus scan in safe mode? That is a good way to catch most viruses in the dormant state.

Here is a page linking you to the drivers you need to install. I would concentrate primarily on the chipset and SATA... the others can be done after the Operating System install.

http://h20000.www2.hp.com/bizsuppo [...] nvOID=1093

First thing I'd find out is how that BIOS password got there in the first place. Is this a second hand computer? Did someone else with access to the computer put that password there? The reason I ask is because the virus may have infected your BIOS as well... although I haven't heard of a virus putting a password on your CMOS setup. Doesn't mean that it's not possible, however. Computers don't come with a password on the CMOS from the factory... so someone (or the virus) put it there. When you remove the CMOS battery, also unplug the AC power... the battery is only a backup when the computer isn't being powered by AC... so if you have it plugged in, nothing will be cleared.