Had the same problem, hanged at compiling shaders. Upgraded from 16GB RAM to 32GB and now it's fine for me.
Maybe check logfile, in my case last lines read:
- Failed to allocate Buffer Memory!
- Failed to create Buffer Resource 'Transient Buffer'
- Failed to allocate transient buffer with size 4096. Probably out of memory.
Have to add I play with around 200 mods and the DLC's :)