[02:36] here, same issue as TwistedModding. [06:06] with LockTexconv=1.
As far as I could tell, the moment the program loses focus it slams to a halt, so it has nothing to do with skyrim, or your load order itself.
Logs.7z Logs2.7z
EDIT: Visual Studio 2015, 2017, 2019, and 2022 x64 install suggestion from the TexConv error C0000005 thread fixed it.
It SHOULD have been already installed. It was, somehow, not. Microsoft Windows, everyone.