How to add domain users to local administrators group in Windows XP?
Login into the machine as an administrator
2. Right click on the My Computer Icon. If the icon is not on the desktop go to Start and the My Computer Icon is an option.
3. Go to Manage.
4. Click on the + sign next to Local Users and Groups
5. Click on Groups
6. Double Click on Administrators
7. Click Add
8. Type the name of the user account you want to add.
9. Click Ok and Apply.
10. Log off as administrator
11. Log in as new user