Yes my windows are genuine. When i bought my PC the manufacturer had put a COA sticker on the tower of my PC in which it's written the version of windows i have on my hard disk (Windows XP Home Edition), the name of the company i bought my PC, the product key etc. Also they gave me a small green booklet that says on the front 'For distribution with a new PC only. I want to slipstream Service Pack 3 and make my new disk preactivated. Do you know if i can do this?