Microsoft Passport Container access denied. No MS suggested fix works.

Drat! I'd hoped for a simple fix. I've exhausted all the options I've discovered online, and really don't want to start from scratch by wiping my PC clean of programs and codecs after seeing the chaos Windows 10's November update caused doing that.

Any other ideas? Anyone?

I'd be most grateful for some help. 

A clean boot made no difference whatsoever. Any other ideas?

How difficult can it be to give Microsoft Passport Container the permissions it craves, especially since I'm the only person and the only administrator who's ever used this PC? It's absurd. 

I've now just done an in-place repair, then a fresh crack at sfc /scannow in PowerShell with admin privileges, neither of which resolved the issue.  Microsoft Passport Container depends on RPC Endpoint Mapper and DCOM Server Process Launcher, both of which are running. I'm out of ideas. 

What else could be causing this lockout? 

Who else can I ask?

A very logical notion, Alex. 

But alas...

Also tried DISM -Online -Cleanup-Image, -RestoreHealth, -ScanHealth and -CheckHealth in an elevated Power Shell. No problems found. WSReset.exe, launched as a Run command apparently did its job, self-closing then opening the Windows Store — but didn't resolve the issue. 

Done. The Passport Container service now displays System as its Startup Type, but even though the container appears to have momentarily launched on boot, something shut it down. From Event Viewer...

Error 7023: The Microsoft Passport Container service terminated with the following error: 
General access denied error.

I've researched the role of Group Policy on this, but find it's applicable only for Passport At Work, and all the group settings for it are not configured. I did find this at https://adsecurity.org/?p=1535

"Microsoft Passport involves a user logging onto the Windows 10 computer with multi-factor (PIN, face, iris, fingerprint, etc) and either creating a new account or associating an existing account with an IDentity Provider (IDP). Windows generates a public/private key pair with the private key stored securely outside of the Windows 10 OS. The public key is associated with the account so that a challenge can be sent that can only correctly respond to the IDP. Another key point to the Microsoft Passport credential system is that the user needs to enroll every device used to access the service (IDP)."

I could be falling down the proverbial rabbit hole, but if this is a credentialing issue, I'm using neither a PIN nor a password since I'm the sole user of this PC, so I assume there's no IDP. And, I don't use the MS cloud. Sorry if this is a red herring. I'm exploring every angle I can.

Thanks for your continuing help. The rest of the registry settings...