If you're using Windows 7, Microsoft Security Essentials is actually pretty much superior to paid ones even unless you're trying to manage it across tons of PCs in a wprk environment. If you've got 8 or 10, Windows Defender is axtually built in and is pretty much the same thing. Either way, if you're using any even remotely modern Windows computer, there's absolutely no reason for a home user to get anything else.
