Open command window here as administrator - Add in Windows 10  

Thanks Shawn.

Directory_Shell.reg
Background_Shell.reg
Drive_Shell.reg

Brink said:

Found it. It was the cmd keys below.

HKEY_CLASSES_ROOT\Directory\shell\cmd
HKEY_CLASSES_ROOT\Directory\shell\cmd\command

HKEY_CLASSES_ROOT\Directory\Background\shell\cmd
HKEY_CLASSES_ROOT\Directory\Background\shell\cmd\command

HKEY_CLASSES_ROOT\Drive\shell\cmd
HKEY_CLASSES_ROOT\Drive\shell\cmd\command

EDIT: I just checked, and these keys are owned by TrustedInstaller. This means you will have to change the owner of each of these keys to Administrators, and set permissions of each of these keys to "Allow" the Administrators group "Full control" to be able to delete them.

It worked!
But now I have PowerShell, can I use the same keys and delete it?

Brink said:

Great news.

You should be able to use the tutorial below to remove the PowerShell context menu.

Open PowerShell window here context menu - Add in Windows 10

Thanks Shawn, Again you did great

Brink said:

You're most welcome.

I created a restore.reg just in case I have a change of heart attack

Upgraded today from build 2004 to 20H2 ver 19042-870 and the previously inserted (open admin command window here ) in my context menu within desktop has disappeared ???? but still have right click (open command line here as admin ) within file background ???
Has the new build overwritten previous added shortcuts .?? to desktop context menu

When upgading to new build do i need to reinsert the shortcut shown at Brinks first post .