The Microsoft antivirus programs for windows 7 and 8 are what I use. I think they are automatically loaded onto a windows 8 computer. But for windows 7 computer you go on the internet to download and install.
Windows Defender AKA Microsoft Security Essentials
http://windows.microsoft.com/en-us/windows/security-essentials-download
If you have windows 8 you might have and be using Microsoft Security Essentials and don’t realize it.
Thanks so much, awesome you.
You’re right. It’s already installed in my Windows 8.1.