cus the windows7 version is a half assed version. It's not really "designed" for windows7 per say, it's more of a duct taped, and quick fixed up version of walker. I used IG for 7 for a bit... my OOG wouldn't connect cus the host file had to be modified. Give them a bit of time, they'll get all the kinks worked out. Hell, how long did it take NCSoft to make L2 run on 7? Took them a bit.