:word:
Would be a lot faster/easier.
But for answers
Since the comp I just brought home is a lot newer and faster, can I just take my hard drive, plug it into that computer and be all good or do I have to do something else?
If you are taking about booting off the drive that was in the other computer then the answer is usually a no until you reinstall windows.
If you want an additional drive for more space you can set the jumper on the back to slave and connect it on the same cable.
Is it easier to take the motherboard out of the other one and put it in mine?
Only if the case for the new one is too tiny for extra drives. Otherwise no.
Is there any way I can completely erase the hard drive with the virus?
Just reformatting will remove the virus in a large majority of cases.
Is there any way I can run 2 hard drives in one computer? I just want to do this so I can back one hard drive up onto the other.
Yes you can attach it in line, and set the jumper on the back to slave. And copy what you want over. I would only recommend this after you’ve reformated the drive in new computer though. And then connect it once you have done such.