The background process svchost.exe (wsappx -p) often uses 40-60% CPU, and some built-in Windows apps like Photo Viewer, Calculator, and Calendar won't open. wsappx is related to Windows apps updates, so I suspect these 2 issues are related. I searched online and found tips such as going to the Start menu, right-clicking on the app, choosing App Settings, and then resetting the app. That didn't work for Calculator or Calendar, and Photo Viewer doesn't even show up in the Start menu.
I also went to C:\Program Files and found the Calculator and Photo Viewer folders, but I couldn't open the apps directly from there either.
I also went to C:\Program Files and found the Calculator and Photo Viewer folders, but I couldn't open the apps directly from there either.