A lot more than most people will believe. If I post anything positive about another MOBILE platform, or focus a real lacking of wp's abilities, I'm labeled zee enemy.... But I use and enjoy a lot of Microsoft products daily:
Windows xp disk images (fantastically fast and uncluttered)
A few GB of server space which is surprisingly unobtrusive
Some old photo stitching tools that are fantastic
Some Bluetooth keyboard and mice
A few (excellent!)GB of their mapping services a week.
A few GB of their software services a week
And then there are the required office products away from home that are annoyingly cumbersome
But the things I use most are dead technologies. They will not be updated, or upgraded, and when they fail, will be replaced with similar equipment out of personal preference, or not replaced at all. The current tend of over complicating and limiting user source actions does not appeal to me.