The game crashes to desktop (instantly, no freezing or hiccuping) ONLY when I approach the island that the Goldenglow Estate is on for the Thieves Guild quest titled Loud and Clear. It's almost as if there's an invisible wall surrounding the island, and as soon as I pass it the game crashes. Now, I have no mods installed, there's no hardware problem, I've reinstalled the game multiple times, I've verified my game cache, etc. I've tried every fix I could find online. Nothing at all seems to fix this problem. I've also tried to set the quest objectives as complete using the console, and it still crashes as I get close to the island.
I've made new saves from scratch and it DOES NOT do it then. So clearly it's my save file only, but there's no other issues at all excpet for that one area.
I really don't know what to do from here besides losing out on the Thieves Guild stuff. Any help is appreciated, thanks.