JWs: Should I fix his computer?

I work with a JW and he says he does not go into Salvation Army stores because he does not want to support their religion in any form. He doesn't know much about computers and he asked me if I would look at his computer and fix it if I could/would. Now, if I do fix his computer would I be supporting his religion knowing he uses his computer for religious purposes? (Of course I am going to fix his computer without charge even though I strongly disagree with his religion.) Thanks.