What Operating System do you use?

Used Maverick OSX 10.8, but it sucks, a lot of bugs, not going to use anymore.

Now using Windows 7.

After my experience in OSX, now I have sure that Windows is the best OS.

Using Windows 7.

Cant wait to have money, I will buy Nokia Lumia Windows Phone.

I multi-boot between Windows 7 and Crunchbang.

Windows 8 :)

Windows 8.1 Pro

Linux Debian 7

Windows 7!
not liking windows 8.. Metro Ui is the only thing i like on W8

Seven

win7 64 bit

Windows 8.1 :)

Windows 8.1 + Start8 (app to bring back traditional start menu) is the best most functional OS I've ever used.