SureAI

Whenever I open up my inventory or open up a box/chest, the game frequently freezes, forcing me to quit out. I've tried disabling all of my mods, but that didn't work. I also have the latest update. Any help?

Have you tried emptying (or mostly-emptying) your inventory, just to see if that helps? There's an issue with vanilla-Skyrim where if you're carrying too many items, accessing inventory can cause lag or freezing due to how much the game's trying to load at once.

That didn't work either. This has started since the beginning of the game.

Do you have set up a clean profile in your mod manager?
Could also be a damaged installation package.
I recommend to uninstall Enderal via Launcher and reinstall Skyrim. Verify Skyrim's game cache after that. Download the newest launcher and a fresh installation package (torrent is recommended).
Just follow this installation guide.

Okay, it seems to have worked by reinstalling everything. Thanks.