Reviewing my Win 10 x(64) 20H2 Event logs yesterday, I observed Win Store app was crashing. Actually, I was alerted to something amiss while monitoring network connections in TCPView, I noticed all the Win Store connections disappear shortly after appearing at system logon time. Win Security Maintenance showed one instance on 4/20 due to "Hang type: Quiesce." There were also three more instances on 4/21 corresponding to system logon activity due to "Hang type: cross-process." The strange part is it didn't occur for every logon. Fixed the issue, at least so far, by performing a system restart. As best as I can determine this was not related to any system update activity. Never saw this one before.
Well, it might be a different issue, but after updating Win 10 1909, I'm having problems with the AppX Deployment Service which is linked to the Windows Store which doesn't launch anymore on my system. And svchost.exe keeps using 10% of CPU time without any good reason, so I will now need to reinstall Windows or upgrade to Win 10 20H2 which may make things even worse, who knows. Thanks a lot M$ for wasting my time!
Refer to below screen shot for possible sources for service non-startup. Also the service doesn't run constantly. It is started and stopped on demand.
I'm not sure what you mean. The problem was that this service is always running after reboot, so I had to kill it. But the problem with high CPU usage has been solved by uninstalling certain Windows updates. However, certain things are still broken so I will probably need to perform a full system reset.
I am pretty sure you have damaged the store yourself, just repair it: https://www.makeuseof.com/tag/5-tips-fix-windows-store-app-issues-windows-10/ Since 2017 Windows 10 has the ability to reset the store.
