Windows 10 Pro - Your Info shows Administrator - but permissions are limited

Regardless of login via a local or Microsoft account, my permissions are limited, such as being unable to change the time zone via Date & Time Settings:

You do not have permission to perform this task. Please contact your computer administrator for help.

• Without any problem, I changed it within the Registry, but the annoying issue persists within Date & Time Settings:

  HKLM\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
  

What options do I have to get full permissions?

You need to make sure that your account is in the Administrators group. This can be done by checking the following:

1. Right-click the Start button and click Computer Management.
2. Navigate to System Tools > Local Users and Groups > Groups.
3. Double-click Administrators and confirm that your account is in that group.

If your account is in the Administrators group, you should be able to do the following:

1. Right-click the Start button and click Command Prompt (Admin).
2. If prompted with a UAC dialog saying "Do you want to allow this app to make changes to your PC?", click Yes.
3. Type net session.
4. If you are an Administrator, you will get a result. If not, you will get 'Access Denied'.