it doesnt mater what OS you use, it just maters how well you can take care of what you own. i had my computer already for over 4years now and its working like i just got it today. never had a problem with it except a few times i had boot problems and nothing ever since.
and for danny if ms antivirus dont work you should also try AVG antivirus (
http://www.grisoft.com) its a really good virus program also.