Systray.exe is only needed for Win 2K or below, so if it's on Windows XP, then it's gotta be a virus >_>
Anyway, nice job with the removal tool
Maybe you could add something that detects if the person has the virus, and if not, instead of saying "The Virus has been successfully removed from your computer", it could say something like "The virus was not found on your system." Not a big deal, but I think it would be a little better