Running Windows XP professional, PC wants to constantly upload data. The PC was originally scanned for viruses and several trojans were removed. All Scans now result in no known viruses. If I turn on windows firewall it stops the uploading, but then I get problems on my network. Is there a good way to monitor the network traffic for this PC and see what is going on? Our network is protected behind a decent firewall, and the system us running antivirus/anti-spyware software.