Hello, I seem to have run into a similar problem as many of the people posting here. I have a Dell desktop computer running Windows 7. I noticed that Microsoft Security Essentials was no longer protecting my computer, uninstalled and reinstalled it, and ran a scan. The scan detected a threat labeled "Trojan:Win64/Sirefef.y". When I attempt to remove it, I get a message telling me that Windows will restart in 1 minute, which it does, preventing me from deleting the virus. Any help from someone more knowledgable than me in removing this Trojan is greatly appreciated.