If you use windows, you would probably have come across hundreds of security loopholes, and viruses trojans, and what not! With all this in mind, you gotta ask yourself, isnt it time microsoft started making antivirus software? I mean, windows is microsofts own creation, so no one else knows windows better than microsoft, right?
Confronted with the above, any microsoft employee would tell you that microsoft doesn't make application software. True, but I still think microsoft is the best company to make antivirus softwares, and it would easily rise to the top in the antivirus market.
With that said, why not build an antivirus along with the OS, so its fully interoperable with the OS? We windows users are anticipating the release of windows 7 in 2010. I would love to see the antivirus feature with that version of windows.