After upgrading Win10, I can't switch accounts and the application can't open. What should I do?

Cause Analysis:
The reason is because the original Win7 system uses the Adminitrator built-in administrator account to manage the operating system, and after we upgraded to Win10, I used the previous account login, but I accidentally used the built-in administrator in win10. There are a lot of problems with the account, which can't open the application, settings, etc. (the settings of the win10 system have been Metroized).
Solution:
First, we must first let the Administrator account open the "Settings", "Account" and other applications;
1, press WIN+R to call out the operation, then enter gpedit.msc Enter;
2, after opening the policy group, the right of the list of options, expand computer configuration] - [Windows Setup] - [security settings] - [local policies] - [security options];

3 Double-click to open "User Account Control: Administrator Approval Mode for Local Account" and set it to "Enabled" and save it;
4, then try to open it, if not, restart the computer.
Second, use another account to log in or create a new administrator account;
After you can open the account management with Administrator, we can go to the account - create an administrator account in other accounts and use him to log in.
PS: win10 system and win8 system are a bit similar, the permissions of the Administrator account are not as large as the Win7 system, so everyone still try to use another administrator account to log in.