By default Microsoft has disabled the built-in Administrator account of Windows Vista & 7. However, if you’re managing multiple PCs you might want to enable this Administrator account so you can have local admin access on all the PCs with the same credentials.
You can enable this Administrator account via the Local Users and Groups snap-in:
- Click Start, type lusrmgr.msc and hit Enter.
- Open the Users folder, right-click the Administrator account, and select Set Password.
- Click Proceed.
- Enter the desired password twice, click OK, and then click OK again.
- Next, right-click the Administrator account and select Properties.
- Uncheck the Account is disabled check-box, and then click OK.
If desired, you can then hide this Administrator account from the login/welcome screen and then enable the login dialog instead of the welcome screen so you can manually type in the user account names.