Windows 10: What is the "Account Unknown" that shows up in registry

I as debugging why I have a lot of 10016 errors in the registry. I read that I need to add administrator Full Cointrol permission to the CLSID and APPID.

I was unable to do so as I did not have permission. Probably not important since system seems to be working and I read elsewhere that these errors are ignorable. However, I spotted an unknown account. This does not seem right. Can someone explain what this account is and if I should be concerned.




:)

 

Unknown account removal

In a 'permissions' dialog an attempt to remove an UNKNOWN ACCOUNT prompts that inheritance first must be disabled. Two options are offered...

1) Convert inherited permissions to explicit permissions on this object
2) Remove all inherited permissions from the object

Which should be chosen, and will other accounts be affected? Or, would it be prudent to ignore the unknown account?

This is an "Sxxx" account and does not appear in the USERS account list, nor with other normal registry accounts.

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code:

 

Account Unknown has full Security permissions on my own User - huh?

and if its listed in the registry like in my case then what? *Redface