What Operating System do you use?

Windows 7 + Linux Mint 16 “Petra” on laptop and kubuntu 13.10 on desktop.

Primary Windows, but also MacCrap with rotten apples and flavors of Linux and FreeBSD for servers ;)

Mavericks OSX

Windows 7 64 bit

Win 8 bit 64

My Regards

Currently windows 8, haven't had any problems so far except for the look.

Windows 7 right now

Windows 8, 64 bit

windows 7

Windows 7