Yes, although it doesn't come with the laptop, you can call ASUS and they will send you one. Your windows product key is on the bottom of the laptop, which can be used with any authentic version of windows. I download Windows 7 from Microsoft, installed it, then used my key and it all works perfectly. Hope that helps!
Just got, seems to run very well on on all but the most intensive games. For games that aren't brand new you can run them on medium or high settings just fine. (Combo of the new i7 cpu + 2 GB 630GM video card take care of most games)
I got 16 GB to work no problems, except don't try the Corsair Vengence DDR3, didn't work for me. Slower Corsair and Kensington worked. I've read up to 32GB; I didn't know you can get 16 GB sticks... it only holds 2 sticks.