I am using Windows 7 Ultimate operating system and my browser is Opera 10. The basic problem that I am facing is that I am getting alerts of Trojan.DL.Win32.FakeAV.cp in Windows 7 Ultimate. Actually, the Avast antivirus, that I have installed in my system recently is giving me such alerts. The issue is that when I try to delete this infection from the antivirus interface, I get a message saying that "Cannot perform the required action." Please lend some help soon.