Let's use the "Add" button and see if we can give you permission to use the registry editor. If your computer has a name, use that where I place computername.
In "Group or user names": Click "Add" to input each of the following:
Administrators (computername\Administrators) click "Ok", then "Add"
CREATOR OWNER click "Ok", then "Add"
SYSTEM click click "Ok", then "Add"
Users (computername\Users) click "Ok"
In "Permissions for Administrators", check the noted boxes for each in the list:
Administrators...Full Control (allow), Read (allow)
CREATOR OWNER...Special Permissions (allow)
SYSTEM...Full Control (allow), Read (allow)
Users...Read (allow)
"Apply" the changes and cick "Ok".
Now see if you can navigate CLSID