If you need a Windows disk, Microsoft Technet has a downloads page where you can download whatever build you like for a 90-day trial (Win7, XP, etc.) and then just burn that ISO to a DVD. You can then use this disk for system repairs and such without getting to the license key portion. If you want to do a full load, just enter a valid license key.
Azza Helios||Hyper Type-R 580W||ASUS M4A79XTD||Phenom II X4 955||ZALMAN CNPS9900MAX-B||4GB G.SKILL DDR3 1600||Corsair Force GT 120GB||2x WD 1TB Caviar Black||HT Omega Striker 7.1||PowerColor HD4870 512MB||Win7 Pro x64
3.48GHz 30/52C||1640MHz 8-8-8-24 2T