I've used vista and 7 a few times and can never get on with it, plus I don't have the dough to upgrade either and I'm happy with xp as it does the job smoothly :-)
OS: Windows XP
Processor: Core 2 Duo @ 2.0GHz
Memory: 2GB
Graphics: 256 MB Video Card (GeForce 7800 GT / ATI X1900)
DirectX®: DirectX 9, 10, and 11 support
Hard Drive: 15 GB
Recommended:
OS: Windows Vista or Windows 7
Processor: Intel Core 2 Quad or higher
Memory: 2GB
Graphics: 512 MB Video Card (GeForce GTX 260/ ATI Radeon 4870)
Controller Support: Support for Logitech G15 and G19 keyboard LCDs in multiplayer
I would man, but I have college tomorrow, and I haven't done an all nighter in yonks.... plus it's me long day tomorrow so im gonna be out of it .... darn college