Its Vista, but it should work with Windows 7. Always check if its compatable or not before you upgrade. But usualy Vista drivers work with the Windows 7.
My Computer
At a glance
Windows 7 Professional (x64/SP1) /Linux Mint 16Intel i5-3570k 3.40 GHz @ 4.6 GHz8GB (2133MHz) DDR3Asus GTX560 Ti (Nvidia)
Computer type
PC/Desktop
Computer Manufacturer/Model Number
GIGABYTE Rig (Custom)
OS
Windows 7 Professional (x64/SP1) /Linux Mint 16
CPU
Intel i5-3570k 3.40 GHz @ 4.6 GHz
Motherboard
GIGABYTE Z77X-D3H
Memory
8GB (2133MHz) DDR3
Graphics Card(s)
Asus GTX560 Ti (Nvidia)
Monitor(s) Displays
HP 23", Acer 19" and a Dell 17"
Screen Resolution
1080p, 1440x900 and 1280x1024
Hard Drives
Sandisk Extreme 120GB (SSD), WD 2TB green and 4 other HDDs