Autopilot.dll WIL error

Let me add. within about 10 minutes after the second sfc I found 7 apparently identical errors in the system event log.:

Autopilot.dll WIL error was reported.

HRESULT: 0x80070491

File: onecoreuap\admin\moderndeployment\autopilot\dll\dllmain.cpp, line 185

Message: NULL

FIXED

It wasn't working, as “Microsoft Account Sign-in Assistant service” did not exist, Then i upgraded from Windows 10 to Windows 11, keeping my files. And voila there it was “Microsoft Account Sign-in Assistant service”, where i changed the properties and there was the happy ending.

WARNING

Users who try this workaround and disable their Microsoft Account Sign-in Assistant service may experience serious side effects afterwards.

The 22-Sept-2022 TheWindowsClub article Autopilot.dll WIL Error Was Reported in Windows 11/10 where this workaround was first suggested warns that " This sign-in assistant utility facilitates users in signing on to several Microsoft apps*...note that if you are using the Outlook Calendar, Phone Link app, etc., then* those apps will not be able to connect to your account."

The batcmd.com article at Microsoft Account Sign-in Assistant - Windows 10 Service also warns that "If this service is stopped, users will not be able to logon to the computer with their Microsoft account."

Dell Inspiron 5584 * 64-bit Win 10 Pro v22H2 build 19045.2965 * Firefox v113.0.1 * Microsoft Defender v4.18.2304.8-1.1.20300.3 * Malwarebytes Premium v4.5.28.266-1.0.2005 * Macrium Reflect Free v8.0.7279

If you have installed Windows with a local account, a key is stored in the TPM chip.
If later, you log in with a Microsoft account, for some reason, the TPM key does not reset.

In order to fix this error, Open Settings -> Update & Security -> Windows Security -> Open Windows Security
Then go to Device Security and under Security processor, click Security processor details.
Then click Security processor troubleshooting and click Clear TPM then Clear and restart.

Once Windows restarts, you will be prompted to reset your PIN. It will ask you to log in and reset the PIN.

Now no more Autopilot errors.

ChatGPT gave me a solution that worked for me and I didn't lose any data... Was very simple..

Remove and Re-install Autopilot..

1. Open PowerShell as Administrator
2. Run this line of code:
   Get-AppxPackage Microsoft.WindowsAutopilot | Remove-AppxPackage
3. Now run this line of code:

Get-AppxPackage -allusers Microsoft.WindowsAutopilot | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

The end..

It should also be noted that the Dell Laptop in the previous post has since died (MB failure). I received a new Razer Blade 18 with Windows 11 Home pre-installed and the TPM enabled and was seeing the same issues as before (app hangs, service hangs, etc).

NOTE: I did try the "windows 11 reset TPM" feature mentioned previously...this did NOT work.

I had to disable TPM from the BIOS on the new laptop to resolve those issues.

This appears unrelated to the underlying HW as the two systems I have that were experiencing these issues are from completely different manufacturers (everything on the mainboard is different on the new laptop). This tells me that this is a 100% Microsoft Windows 10/11 issue.