If you have your own administrator account, you may want to disable the built-in Administrator account. Doing so prevents anyone from logging on with the built-in account. In order to log on as an administrator, a user would require access to your administrator account. Therefore, as you can likely see, disabling the built-in account is a good security practice.
Note: The built-in Administrator account in disabled by default in Windows 7. To disable the Administrator account in Windows 7:
- Open Local Users and Groups.
- Select the Users folder.
- Right click the Administrator account and click Properties.
- From the General tab, click the Account is disabled option.
- Click OK.
You can re-enable the Administrator account by repeating the steps described above.