Quick rundown: Yes, windows 10 and the MS store are up to date. Yes I'm logged into the Store. Yes the target install drive has enough space for the game (~125 GB). Yes I've tried an alternate install drive. Yes the Xbox Services are running. Tried download with and without anti-virus running. Yes I've tried installing after a clean boot. No I don't have a restore point I can use. No, I haven't reinstalled Windows yet because no game is worth that much trouble.
I'm currently trying a copy of the launcher that was not downloaded through the MS store In hopes I can move the files to where the store would install them and trick it into realizing the files are there. Does anyone have that filepath or any other suggestions?