old computers
My husband repairs computers and says that the only thing that a virus would wreck would be the hard drive. It might cost you some money to repair though.
If you are looking just to get rid of it, you could contact your local AITP (association of information technology professionals) chapter, my husband says that sometimes they are able to take computers to rebuild them. Also, you could contact local universities like DeVry University or ITT. Sometimes they have technology days where they take in broken electronics, repair them and donate them back to the needy. Or, you could always donate it to the Salvation Army or Purple Heart.