If you’ve got any geek skills at all, you probably don’t need to bother paying for an expensive security suite and a subscription. Instead, you can use the completely free Microsoft Security Essentials antivirus application, which we’ve already given our official blessing as a great solution.
I also explained the basics of how to keep your computer updated using Windows Update and third-party tools like Secunia PSI (which we’ve previously covered here).
For more, check out the article over at Lifehacker: Stop Paying for Windows Security; Microsoft’s Security Tools Are Good Enough