DC Promo error: The local administrator account becomes the domain administrator

To resolve this error, open a command-prompt as Administrator and execute the following command: net user Administrator /passwordreq:yes

Remove Windows Boot Manager

1. Click the "Start" menu button and type in "cmd" in the "Search programs" box. Right-click the "cmd" listing from the search results and choose "Run as Administrator" to open the black Command Prompt box.

2. Type the following line into the Command Prompt box:

bcdedit /set {bootmgr} displaybootmenu no

Press Enter. Entering this command line tells the system's Boot Configuration Data (BCD) store that you do not want the operating system selection menu to be displayed when booting and loading the operating system. The command can be used in instances when the boot selection menu displays even though only one operating system option exists.

3. Restart your computer to allow system changes to take effect

Change Password Policy Setting.

Change password policy settings

Windows 7 

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You must be logged on as an administrator to perform these steps.

If your computer is on a domain, only your network administrator can change password policy settings.

You can help protect your computer by customizing your password policy settings, including requiring users to change their password regularly, specifying a minimum length for passwords, and requiring passwords to meet certain complexity requirements.

1. Open Local Security Policy by clicking the Start button , typing secpol.msc into the search box, and then clickingsecpol.‌  If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
2. In the left pane, double-click Account Policies, and then click Password Policy.
3. Double-click the item in the Policy list that you want to change, change the setting, and then click OK.
   This table lists the password policy settings that are available, explains how each setting works, and provides a recommendation for each setting.

Credit: Microsoft