You need to enable the admin account, not sure if this works on Starter.
1. Open a command prompt, but choose to run it as administrator.
2. Type and then enter .. net user administrator /active:yes
3. Logoff and you should see an admin account picture
4. Do what you need to do as admin.
5. Login as user.
6. Open a command prompt, but choose to run it as administrator.
7. Type and then enter .. net user administrator /active:no
Leaving the admin account active is a big secuirty risk.