Xbox shutting down in starfield, atomic heart

It's not Atomic Heart specifically. It's that the XBox app is where I purchased Atomic Heart through, and because my XBox app on PC will not log me into XBox live when I launch Atomic Heart, for some reason, it also doesn't allow Atomic Heart to launch. Looking around, I'm far from the only person this seems to be happening to. And it's affecting more than Atomic Heart now. Any game I need to log into XBox live for, will not work when I launch it now. Including games like Wolfenstein: The Old Blood, which I had working just a month ago. Before anyone asks, yes, my Live subscription is up to date and active. Thus far, no remedy I've found has worked.

I tried making space and moving Atomic Heart to C: but am still getting the same error you started the post with (Error code: (0xc0000005)). Not hopeful about Starfield working in a few days here...

Edit: Going to try and install some of the other games you listed to see if the error persists.

No progress in Atomic Heart

Atomic Heart is coming to Playstation 4, PC and Xbox One 31 Dec 2019

There are a few ways you can do to fix Atomic Heart's problems if you're using Xbox Game Pass on a PC:

1. Make sure your computer satisfies the minimum system requirements for the game by checking. The system requirements for Atomic Heart are listed on the game's shop page.

2. Verify any updates to make sure the game has the most recent patch or update. You may do this by selecting Atomic Heart in the Xbox app's "My Library" menu, then checking for updates.

3. Uninstall the game: Try uninstalling and reinstalling the game if resetting it does not fix the problem. To accomplish this, pick "Uninstall" from the context menu when you right-click Atomic Heart in the Xbox app's "My Library" section. You can reinstall the game using the Xbox app after uninstalling it before.