We have seen the Trojan "downloader.vbs" on one of our computers, and we keep deleting it and clearing the temp files but it keeps coming back. I read somewhere that it also infects svchost.exe, but we can't delete that file without affecting windows' operation. I have run a few antivirus programs on it, and they find it, but they don't remove it.
We are running MS Windows XP Pro SP3, the antivirus program McAfee, and browse with Mozilla Firefox. Any help on this situation will be greatly appreciated.