Windows is NOT a virus.
Viruses do something.
Not only that, but it will scramble any disks that are even close to your computer. It will recalibrate your refrigerator's coolness setting so all your ice cream goes melty. It will demagnetize the strips on all your credit cards, screw up the tracking on your television and use subspace field harmonics to scratch any CD's you try to play. It will give your ex-girlfriend your new phone number. It will mix Kool-Aid into your fishtank.