Hi Sean,
If we want to check startup items, MSCONFIG doesn’t work now, just open Task Manager and move to Startup tab, then you could disable necessary or unknown startup items here.
I my opinion, you could execute a repair upgrade, this way can fix system components issue. Use media creation tool to download the latest 2004 iso, then mount iso to in-upgrade current system.
Download media creation tool here:
https://www.microsoft.com/en-us/software-download/windows10
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