I have a user who opened a file in windows live messenger, the file is called party_jpg.zip. Our anti virus software eTrust did not identify it as a virus. When the user clicked on it it launched itself and sent it to others that were logged on in their contact list. I have found the file, removed it, ran a scan with our anti virus software and a scan with spybot. I have fixed the issues spybot found. When i logon in safe mode and run spybot it does not find anything. After rebooting, and searching on the party_jpg file it is back in the C:\Windows folder. I am lost here, what should i do next, remove live messenger?