I have an old computer from 2001 in my closet. It has Windows 2000 installed. However, it has lots of viruses.
Would you recommend getting a new OS and using the computer as a server? Also, roughly how long does it take to make a server?
It can be used. I'd put Linux on it. Could be done in about half a day, but the time depends on several factors such as machine spec, and your own abilities.
Do you want a server though???