Just reporting that I got the exact same thing this morning (using Avast 9, IE 10, Windows 7 64bit). Nearly had a heart attack! Quite relieved to know others are seeing the same thing. It’s almost certainly a false positive but it would be nice to get official confirmation … my spidey senses are tingling!

To clarify … Avast identifies the virus right at the Google login screen literally before you even login. It also seems to happen on the OLD google login screen only (with the username/password boxes off to the right). The new login screen (with the username/password boxes in the middle) doesn’t cause the same problem.