My Norton Anti-Virus (2003) keeps giving me a virus alert about a file called C:/Windows/System32/msoj.dll every two seconds. It says it is a Backdoor.Trojan. I followed everything that symnatec told me to do but it is still there. I have Windows XP home edition and any information would be appreciated to get rid of this. I've tried Ad-Aware, Norton 2003, Bazooka, Trojan Hunter, and a squared. Nothing seems to work.