I am a Microsoft Windows user!
I used to work on a Windows 7 until Microsoft develop Windows 8 and 8.1. There is a big differences between Windows 7 and 8. The way how Windows 8 is turning on is quiet faster then win 7. Also, when you press shut down, the PC is going off in a few seconds. When I install this version I was really shocked from the results.
The layout and design are similar to win 7 but with some upgrades. What I have really discover was the way how the windows work on games. Before I run DOTA 2 I install the new updates from N-vidia and then I run the game. When I play the game on win 7, there are few details that I couldn't turn on, but now the game run on a full audio and video quality.
The only problem that Windows has and Mac and Linux don't are the viruses. I think that Microsoft don't care or like some conspiracy theory telling us, they intentionally create viruses so they can spy their users...