How to change the standard user of win10 professional version to administrator?

How do win10 Professional Standard users change to administrators? It turned out to be an administrator account, but I upgraded Windows 10 some time ago. I accidentally changed the administrator to a standard user a few days ago. I found that I can't open a lot of software, the game can't play, the administrator's operation can't be done, I want to The system still needs administrator privileges. What should I do? Then I finally found a way.

1, first open the new notification in the lower right corner of the desktop, click on all settings

2, open, click update and maintenance

3. Click Restore, restart immediately after clicking Advanced Startup

4, after rebooting, enter this interface, and then select Troubleshooter

5, under the troubleshooting interface , click on the advanced option, open the interface

6, click to start the settings, there is a restart button in the interface, click

7, select 4, start security Mode

8. After clicking, the system restarts. After completing the password when logging in to the system, enter the safe mode, open the control panel, find the user account option under all the control panel options, click to change the account. Type

9. Select the administrator and click on the change account type in the lower right corner. After restarting, it will be fixed and normal.