I have Legendary Edition, all three DLC installed. Latest patch. I don't have the unofficial Skyrim patch. My mods are: UFO 1.1b15, Heathfire weapon display fix, Weapons and Armor Fixes 4.0, Immersive Armors, Complete Crafting Overhaul 1.3, Frostfall 2.5, Storage Helpers, Apocalypse Magic, Killable and Lootable Children, SkyUI, Enhanced Blood Textures, Dance of Death, and JaySus weapons. BOSS doesn't detect any mod conflicts. My specs are well above the minimum requirements. SKSE's log has nothing special in it. I am running SKSE launcher from a folder as administrator. So I decided to play some Skyrim, so I loaded up my converted Dovahgolt startersave that never gave me problems. I wanted to first check if my mods were up to date, so naturally I had to update NMM. There were no changes in mods, or Skyrims files. I didn't ever do the Dawnstar nightmare quest as I know it's buggy as hell. And now whenever it saved, most of the time (sometimes it saves succesfully) it CTD's. Sometimes it CTD's after it loads an area. So naturally I checked if my mods were conflicting using BOSS, redownloaded and reconverted the Dovahgolt, turned off autosave, and tried again. Same issues. So I went to play on my fairly recent Lvl 27 Dovahgolt save, and there weren't any crashes at all. Nothing on saving, sleeping, waiting, fast traveling, etc. I'm really confused. It can't be corruption as I got a fresh save, it isn't quest related, and it doesn't seem to be mod related. The level 27 save was made before I updated NMM from 4.6 something to 5.1.0. The hell is going on?