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Microsoft Security Essentials is one of the best antivirus and antimalware product which is available absolutely free to use.
Its a product from Microsoft and can be installed in genuine Windows OS...
Microsoft Security Essentials provides real-time protection for your PC that guards against viruses, spyware, and other malicious software.
It can be used in Windows XP, Vista and 7. 32 and 64-bit (vista and 7) versions are supported.
Microsoft Security Essentials provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software.
Microsoft Security Essentials is a free download from Microsoft that 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.
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.
Before installing Microsoft Security Essentials, we recommend that you uninstall other antivirus software already running on your PC. Running more than one antivirus program at the same time can potentially cause conflicts that affect PC performance.
For windows xp, vista and 7, 32bit:
Size: 11.66 MB
For windows vista and 7, 64bit:
Size: 14.36 MB
The last VDF update - Offline:
Size: 90.97 MB