MoUSO core is a processor that prevents threats from affecting the window update and resolves the issues that can cause errors in the window update process. For fixing the MoUSO core worker error, you should
- Disable allow wake timers
- Delete conflicting programs
- Update your system
- Disable or remove external hardware

For detailed information on each steps, you can read my article.
Read more: https://getassist.net/what-is-mouso-core-worker-process-how-to-disable-it/