Alxnasophxe Do you use mods or custom content, and if so, does this still happen with the Mods folder removed? Please test if you haven't already.
If this save freezes with no mods or cc, please test a different save, for comparison's sake.
If the new save freezes too, please run a dxdiag and attach it to a post. Hit Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the camera (Insert Media) icon with the other formatting buttons.