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That is essentially a rootkit... well, not exactly. It is a file that hides other files, so just deleting what you see won't do it. There are hidden processes happening that you will need someone that is used to dealing with this type of thing to help you out. Use the last two links that RiverRat gave you to get you on the right track.
If you feel up to it, go to www.sysinternals.com and download processexplorer, autoruns and rootkitrevealer. Use processexplorer first to see if there are any un-published rogue processess running hidden. But first follow RR's instructions.
Roy Mel - YourTechOnline technician
roy@no_spam_yourtechonline.com (remove no_spam_)