I have Oblivion running on Windows 7 and it looks good and plays good for 5 to 10 minuets. At this point the game keeps on running but I have no control. This does not seem to be caused by anything in the game as it always happens in different locations. I do not have any problems like this in any of my other games on this computer. If I am moving foreword my character just keeps going until she hits something and then I have no control and the mouse freezes and the keyboard does nothing but the game still runs. It has an ATI 9600 video card with 512mb of ram, 2TB hard drive, Intel 3.4 gig processor, and 4 gigs of Ram. There are no mods in it yet. What should I look for?