Explorer won't start, Trying "Start MS-Settings:" getting Class Not Registered

Je He 26 Reputation points
2022-04-12T18:17:45.473+00:00

I have a windows 10 computer that was working until last Friday. During the day, it had some kind of problem and was restarted. When it restarted, Explorer wouldn't start. If I try to do it via Task Manager, it starts, and keeps spawning additional explorer tasks, with the task bar flashing, until I use Taskkill to stop all explorer tasks. I can start explorer on a folder. I have tried sfc /scannow and dism, with no luck. I have tried a repair install, no luck. I can't get into settings to try windows update, as when I use Start MS-settings: in administrator command prompt, I get a MS-Settings: Class Not Registered error.

In the event viewer, I get messages like this:

Faulting application name: Explorer.EXE, version: 10.0.19041.1586, time stamp: 0xc1380384
Faulting module name: ucrtbase.dll, version: 10.0.19041.789, time stamp: 0x2bd748bf
Exception code: 0xc0000409
Fault offset: 0x000000000007286e
Faulting process id: 0x1e08
Faulting application start time: 0x01d84e9629da89d7
Faulting application path: C:\WINDOWS\Explorer.EXE
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: 398d9298-4778-49d1-8144-91b7b4bed73c
Faulting package full name:
Faulting package-relative application ID:

Faulting application name: sihost.exe, version: 10.0.19041.746, time stamp: 0x0ead4601
Faulting module name: KERNELBASE.dll, version: 10.0.19041.1566, time stamp: 0x0833f2d4
Exception code: 0x80270234
Fault offset: 0x000000000010b362
Faulting process id: 0x117c
Faulting application start time: 0x01d84e9616dd6dd3
Faulting application path: C:\WINDOWS\system32\sihost.exe
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report Id: 350e2ba5-6ef1-486c-8466-35e5b7f300c4
Faulting package full name:
Faulting package-relative application ID:

The BITS service failed to start. Error 0x80004005.

Faulting application name: pcdrsysinfosoftware.p5x, version: 6.0.7303.400, time stamp: 0x613065a6
Faulting module name: ucrtbase.dll, version: 10.0.19041.789, time stamp: 0x2bd748bf
Exception code: 0xc0000409
Fault offset: 0x000000000007286e
Faulting process id: 0x1d08
Faulting application start time: 0x01d84e9122229d84
Faulting application path: C:\Program Files\Dell\SupportAssistAgent\PCD\SupportAssist\pcdrsysinfosoftware.p5x
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: a8b2e6a0-af12-4e8f-a020-ab6ee0a2f57c
Faulting package full name:
Faulting package-relative application ID:

The SysMain service terminated with the following error:
There are no more endpoints available from the endpoint mapper.

Any ideas?

Windows 10 Network
Windows 10 Network
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Network: A group of devices that communicate either wirelessly or via a physical connection.
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  1. Limitless Technology 39,461 Reputation points
    2022-04-19T07:54:02.757+00:00

    Hi JeHe-4126,

    It looks like you have corruption in your operating system. You have a combination of issues showing up here. I suggest that you fully update your system, reboot and see if the issues are resolved.

    The second error does look like it could be to do with your graphics drivers, so I recommend that you check them for updates too.


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