If so then check out our new Consumer security software providers site

“Hackers and scammers sometimes use fake antivirus programs to trick you into installing viruses or malware on your computer. The companies listed below provide safe consumer security software that is compatible with Windows”

http://windows.microsoft.com/en-GB/windows/antivirus-partners#AVtabs=win7

If you’re running Windows 8 or Windows 8.1, you’ve already got Windows Defender built in. For information see Find out how to protect a Windows 8 or Windows 8.1 PC

Get more help and support for securing Windows

Rob