After being in beta stage, our favorite Antivirus utility Microsoft Security Essentials 4.0 was released last week.
According to the Microsoft Download Center:
Microsoft Security Essentials runs quietly and efficiently in the background so you’re free to use your Windows-based PC the way you want—without interruptions or long computer wait times.
If you’ve already have it installed, you should be automatically updated. If not, head to the Microsoft Download Center or the Microsoft Security Essentials site.
It will run on XP and above. There is a 64 & 32-bit version available. The new version looks cosmetically the same, but includes extra protection and stability.
Editor Note: Keep in mind Windows Security Essentials doesn’t work on Windows 8. Microsoft has included MSE and Windows Defender.