Windows cannot run without an anti virus software. Particularly if your Windows PC is connected to the Internet, and you just visit websits out of the blue, install software like smileycentral, you are prone to get infected by malware and trojans. If you dont want your computer to get infected and your data be lost, you definitely need a virus scanner, or you should be using linux.

If you are using a windows PC, I recommend Avast. Norton is supposed to be the best of them all, but they cost you a lot of money. For a home PC, avast has got a free edition that comes with a free licnesekey which you cna install and use the software for about a year, and after the licens eexpires, you just need to reapply. Its as simple as that.

Today, after my lappy recovered with a new installation of windows, the first thing that I installed was Avast Home Edition, and when I tried to install a driver that I had stored away in a memory card long ago, I found that it was infected, and thats how my PC got infected the first day itself. Miraculously avast cured that file, and I have installed the driver and the lappy is working perfectly. And it comes with the best price. Its free!.