Hello, I'm in desperate need to remove both Sirefef.B and Sirefef.Y trojans infecting my desktop computer. My computer is running on Windows 7 64-Bit Home Premium. I believe that I may have contracted the trojans when I downloaded a "new" video converter for my Nook. Although, I'm not entirely sure if this is the case. Regardless of the cause, I noticed the symptoms of a sirefef trojan when my Microsoft Security Essentials disabled real-time updates. I uninstalled MSE and installed a fresh MSE, however I believe this may have made matters worse. I am unable to do very much in terms of erradicating the virus as my computer keeps displaying a pop-up telling me the computer will restart after one minute. I essentially have no time to perform any sort of scan since the computer keeps restarting. I was at least able to identify the trojans through MSE's history of detected malware. What can I do to remove the Sirefef.B and Sirefef.Y trojans?