most newer machines are set to cable select. no need to mess with jumpers

Cable select should be fine, but then again sometimes computers have their conflicts and you will have to set the jumper anyways.

Did you try starting the PC in safe mode to scan/remove the virus? It might save some time of opening both machines and setting things up.

First, see if you can find a bootable CD-ROM antivirus program or try booting into safe mode.

Otherwise:

Easiest bet is to unplug everything from the secondary channel on your machine (this is the channel that your primary hard disk is not plugged into) and plug the drive in. If it doesn't get autodetected then you migh move master/slave jumpers (some drives have a master/single and slave setting, some drives like Western Digital must explicitly be jumpered master, slave, or none, just depends on the drive)

The drive will appear as a new drive letter in windows as long as your BIOS is set to autodetect a drive. If not you might have to make another change.

Best case scenario: no config changes. Worst case: two config changes.

Ask more if you need to. I can help.

Sounds like typical Dell. Mines been f'd for almost a year now. Can't even wipe the HD. POS.

I wipe the hard drive on my Dell about every 6 months, no problem. Just boot using something like The Ultimate Boot CD, run FDisk or something similar, install your new OS, and you're off and running.

Hopefully that ain't necessary in this case. Safe mode, or running it as a slave on an updated machine should work fine.