Hi, about a year ago I had the sirefef trojan and got help here (http://www.techspot.com/community/topics/win64-sirefef-virus-help.182401/?mobile=false) Everything was fixed, but it appears to have come back or I got a new one. Anyway... I left my computer, came back, and it was shut down. Upon reboot, it hangs at "Starting Windows". I can start it in safe mode. It has booted normally a few times but it is not repeatable. When it did boot normally, network, sound, and other basic functions were not working. Additionally, MSE was gone, and the operatign system looked liek Windows 97. I managed to reinstall MSE and it detected these trojans: Trojan:Win64/Sirefef.AA, Trojan:Win32/Sirefef.AN, Trojan:Win32/Sirefef!cfg MSE said it removed them but problems persisted. I have tried a few things )including a full Malwarebytes scan that found nothing and startup repair 4 times) as documented here (http://www.sevenforums.com/general-discussion/296806-windows-hangs-startup.html). But I don't seem to be making progress so I came here again! I have Windows 7 64bit, how should I proceed?