Download MSE v4.0 PC’s Free Antivirus and Antimalware Tool – Micosoft has just pushed a new update of MSE and make it to version 4.0.1526.0 with many bug fixes and performance enhancements. Obviously, it has more advanced virus detection and scanning technology.
So far, it is the most favorite free antivirus tool that many Windows users installed it. However, make sure you are running a genuine copy of Microsoft Windows.
MSE4.0 is available for Windows XP and 7 both 32-bit and 64-bit. Also make sure, to avoid conflict, you better uninstall any other previously installed antivirus or Internet Security app(s).