Change a user's account type in Windows 7

You can change the user type from Standard user to Administrator or from Administrator to Standard user. Windows requires at least one administrator account on a computer. If you have only one account on your computer, you can't change it to a standard account. Perform the following to change the account type:
1. Click Start button , click Control Panel.
2. Click User Accounts and Family Safety if the View by: is Category and then click User Accounts.
Or
Click User Accounts if the View by: is Large icons or Small icons.
3. Click Change your account type (If you are prompted for an administrator password or confirmation, type the password or provide confirmation).
4. Select your new account type and then click Change Account Type.