Antivirus programs are necessary to have on your personal and business computers. The Microsoft Security Intelligence Report says a PC without an Antivirus Program is five times more likely to become infected than one running an Antivirus Program.
Viruses can prohibit a computer from booting properly. They can make a computer run very slowly. Viruses can attack other computers on the same network. They can steal information from the infected computer.
I recommend using Microsoft Security Essentials for several reasons. First of all it's free! Secondly; it is non-intrusive and will not slow down your PC when it is running. Thirdly; a Microsoft product running on a Microsoft Operating System will work well together. You can download it free here.
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