Alright so my oblivion used to work fine, then it just stopped working all together. It will get to the first loading screen after the Bethesda opening, then just crash. I've defragged all my computer basically, as well as all my old folders I had oblivion in. I used the BOSS program for it as well. I have both the DVD and the Steam Oblivion GOTY edition. My DVD version broke so I got the Steam one one sale, which included all the DLC for oblivion. How can I fix it so it doesn't crash at all?
My computer is Vista, and yes I know they suck, but it used to work.