Awesome. Thanks!

Just replying to my post... After a lengthy and annoying process of elimination I found that it's the fxambbeamxbdustbig02.nif file located under meshes\effects\ambient. Not sure why, this goes a bit above my head, but once I removed that one file, I was able to get into Dragonsreach. For what it's ...

It appears I'm getting a CTD when entering Dragonsreach. I've narrowed it down to the Particle Patch All In One that I installed for SkyrimSE. I've seen other who have this issue, and one even suggested installing the selective option, but I noticed that's for Oldrim. Not sure if this would work for...