Re: two computers, one bad HDD one good HDD can I swap?
i didn't quite understand which computer has which hard drive, but you can switch hard drives no problem, but you'll have to do a fresh install of windows. Just make sure they use the same interface (SATA or IDE). Open up the computers and see if the cables that connect the HDs to the motherboard are the same. The wide grey wires are IDE and the thing (usually orange) wires are SATA.
"Is virtue a thing remote? I wish to be virtuous, and lo! Virtue is at hand." -Confucius