Grabbed Fallout 3 on Steam a while back, decided to play it recently. Installed FOOK and FGSE. Game ran perfectly fine for about an hour, after that I began to have random freezing problems where the game would stop but any audio would continue normally. In looking for a solution, it was suggested that I patch the game, both the official 1.7 patch and the latest unofficial patch. After doing so, Fallout 3 began to crash immediately after loading the first title slide. Disabling the unofficial patch did no good, as did disabling FOOK and launching it without FGSE. After deleting everything entirely and doing a clean reinstall with just FOOK and FGSE again, exactly the same as the first time, it still crashed after loading the first title slide. In the middle of all this I found out about the limiting the game to 2 cores solution, which would have been great to know before I installed the patches. Last thing I have done is remove FOOK entirely, which fixed the issue of crashing immediately and here I am. This leads me to conclude that one of the two patches did something that an uninstallation won't remove, which is interfering with FOOK. Does anyone have any suggestions as to what that might be?

EDIT: Discussion with friends has led to the assumption that it's something in the registry or a .dll that was modified and not put back. If anyone knows what specifically the 1.7 official patch updates in that regard, or what the unofficial patch updates, that would be awesome.