Interestingly enough the military supposedly recognizes that Window's is less secure. Apparently the military has been converting to Macs in order to try and secure data.
...have determined high-ranked officials to go with the less secure Windows platform
Add to this the inherent security of the UNIX-based MacOSX
I just like to see Microsoft getting a run for their money. Obviously, I would vote for Linux since I like it and it can run on the same hardware, but giving Microsoft some competition is always a good thing.