Enable Vista's Built-in Administrator Account

If you’re not comfortable in using command line inactivating Administrator account in WindowsVista, there is another easy way to enable the Administrator account by using graphical user interface (GUI) within Vista desktop. It’s not necessary a must to use Administrator user account to login to Vista, but it’s useful if you want the convenient of using computer without distraction of User Account Control,or simply want to have a super user account as a ‘backdoor’ backup that able to reset your password if forgotten.

How to Enable Windows Vista and Windows 7 Administrator Account

Method 1
Under the command prompt shell window, run the following command:
net user administrator /active:yes
Note that you may need to disable UAC or open elevated command prompt.
Method 2
Enable the built-in Administrator account by using the Local Users and Groups MMC console to change the properties of the Administrator account:

1. Open the MMC console and select Local Users and Groups.
2. Right-click the Administrator account and select Properties. The Administrator Properties window appears.
3. On the General tab, clear the Account is Disabled box.
4. Close the MMC console.
5. Administrator access is now enabled.

Method 3

How to Enable Administrator Account and Show on Welcome Screen from GUI Local Security Policy

1. Click on Vista Start button, then go to Control Panel.

1. Inside Control Panel, click on System and Maintenance link, follow byAdministrator Tools at the bottom.
2. An Administrator Tools window appears. From there, click on Local Security Policy applet.
3. Alternatively, type secpol.msc in Start Search box and press Enter.
4. Click Continue on User Account Control’s Windows needs your permission to continue running Microsoft Management Console (MMC)dialog box.
5. On the left pane of Local Security Policy MMC, expand Security Settings(should be opened by default), then expand Local Policies.
6. Click on Security Options branch.
7. Double click on Accounts: Administrator account status setting, then select Enabled radio button on Local Security Setting tab of Properties window.
8. Click on OK button.
9. Log off, switch user of restart your computer to logon with activated Administrator account.