Win32/Sirefef.GC Trojan is a computer threat that could be detected by some antivirus software applications such as Avira, Eset Smart Security, ESET, MSE, etc. It has been classified as an invasive multiple component Trojan infection, which has the capability to carry out a variety of destructive behaviors on affected computer. Up to now, Win32/Sirefef.GC Trojan specializes in the attack on various Microsoft windows operating system platforms, including Windows XP, Windows 7, Windows Vista and Windows 8. When installed, Win32/Sirefef.GC Trojan may typically slow down the performance of computer via occupying high computer resources.