Hello there, a couple things comes to mind: You are saying you run the survival beta, are you sure the mod are compatible with the survival beta? (I'm not a modder, but this might be the culprit) Are the mods still compatible with 1.5 of FO4? I guess they where working on 1.5 before right? And if you just 'downgraded' Windows OS from 10 to 7 (If you can do that..?), that might give you issues for sure.Seems strange you would get issues using Win 10 though, and if you had issues before and went the way to downgrade I am sure you have or have some issues with the stability with your system? Win 10 should by now work flawlessly on most systems TB, but you might have other reasons for doing so. Just my two cents here, far from any expert beyond that, but I thought I would try to see it with fresh eyes.. Good luck though! Thanks for the reply. I changed back to the non-beta version and it crashed on the first try (but I hadn't reinstalled all mods). After reinstalling all mods, it actually works again. So