I had windows 8.1 on my laptop but I did not like the way Microsoft attempted to introduce the OS in computers with non "tablet" features making it a bigger hassle than it needed to be so I went back to windows 7. Windows XP on my old desktop which I used for playing games.
How about you? Which operating system do you use?
I use windows 7 , my bro uses windows 8 . His bluetooth is not working anymore may be due to avast. I prefer windows 7 . Its more easy to use.