I have one PC on a microsoft network that has a trojan virus. Symantec antivirus 10.1.5 does not find it but PC tools spyware doctor finds it. It appears to remove it when it's disconnected from the network but as soon as I plug in the T/P cable it reappears. The only info I can find on the internet calls it "Trojan-Spy.Banker.CHC". It says that it was created in Brazil and is also known as Troj/Bancos-BBU. I really need info on how to remove this trojan.