text: if my virus program quarantines a virus, but cant clean it.. do i need to worry? my virus program detected a trojan horse from a malicious website immediately. it said it was moved to a quarantine folder after attempts to clean it failed. now it is quarantined by mcafee.do ineed to worry about it, or can i ignore it? no, you don't have to worry about it, the virus is trapped and can't execute, however that would drive me nuts.  back up any and all files you want... and reinstall windows... sure you could go and try to remove it manually but that's just a pain (and you've probably spent more time doing that than you would have reinstalling windows).  but if it won't bother you... then ignore it.