My laptop has been infected with sirefef virus. I noticed it this morning when Microsoft Security Essentials was disabled. I reinstalled it and found out that it was sirefef that turned it off. It's showing that the computer is infected with at least three types of sirefef (sirefef.AB, sirefef.P and sirefef.B). I've been trying to fix it myself using antivirus, but the computer keeps on restarting due to critical error. So I try it in safe mode but same thing happens just little later. I searched google for solution, but nothing worked. Any help will be appreciated.