What Operating System do you use?

I use window 8.1

windows 8.1 for me i used windows 10 for alittle time it was good but windows 8 good for now

I'm using windows 7 and linux

linux

Still using Windows 7.

i am using windows 7 .. and i am happy with that.

Windows 10, and I really love it :)

BUT! missing win7...

I use Windows 7 professional since 5 years.

I use Windows 8.1 and Windows 7

windows 10