Microsoft Security Essentials
Microsoft security essentials is free program which protect your pc against Viruses spywares and malwares.
It is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure — when you’re green, you’re good. It’s that simple.
Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times.
There is X86 version and X64 version so make sure that you installing the right one for you windows
Download Link
Pingback: Special Topic Special Windows Themes | Windows Themes Free