How do I open the Administrator account after the Win8.1 system is installed?

After installing the system, the Administrator account does not appear, the reason should be hidden, the system is the default hidden administrator account. Open the Administrator account in the following ways:

First, press the "win+f" shortcut key, click on a number of locations, such as the figure.

Second, enter "CMD" in the search program on the right click to select "Run as Administrator."

Third, when you enter the command prompt, enter the command: "NET user Administrator/active:yes (meaning to force open the Administrator account)" and log off, and you can log on using the administrator. If you want to cancel the administrator activation, enter "NET User Administrator/active:no".