I started up my Windows 7 computer this morning, and tried to log in as normal. The system hung for a while at the welcome screen (with the loading circle next to welcome) and then briefly flashed error wrong password before going back to the welcome screen again. It did this about 12 times before it returned to the normal login screen and I could enter my password to log in. Is this a virus or just an odd glitch? Windows event viewer says there are 12 failed logon events over the course of a minute and 12 seconds (all identical, logon type 2) with two simultaneous logon events happening twice within one second (so time 1 logonx2, time 2 logonx2).