Look at Forbes, World's Richest Men 2003,
http://www.forbes.com/2003/02/26/billionaireland.html
Bill Gates, a Harvard Drop-out has $40.2 Billion! Warren E Buffett the 2nd in place lost to him by 10 Billion.
Its because Bill Gates is too filthy rich that people "specially" write viruses against Windows. I mean, Linux is also virus vunerable but there's seldom some big time viruses against it because everyone is happy that is FREE. Micosoft programs is so expensive and is not like they are losing money or anything. They have too much profit as you said. My friend told me about MSDN subscription and how intrested he was in it until the price had put him off, a few thousand dollars for 2 years or so. Microsoft deserves to be attacked by viruses but the problem is, we, the end-users are most affected by it. Even if Windows is not the best OS, Office 2003 is the best Office Suite around and is important for productivity in companies.