What should I do if the win7 computer's boot program cannot be changed?

Recently, a friend found a strange problem. My ghost win7 64-bit Ultimate download computer can't change the boot program. What should we do?
1. First, let's go back. Win7 computer's desktop interface, then find the computer icon, right click on the computer icon, and then select the management option in the slide down menu.
2. In the open computer management interface, we click to select local user and group-user in the left menu bar, so you can find the administrator option in the right window. Let

3. Double-click to open the settings window administrator option, then switch to conventional interface in this column, we can see that, before the default settings, the following "Account Disabled" option is Check the box, we need to remove it, then click OK at the bottom of the window to save the settings.

After setup is complete, we again change the boot program, it should be changed.