Method 1
Switch account types in seconds using Windows’ modern interface.
Open Settings
Press Win + I.
Go to Account Settings
Navigate to Accounts > Other users.
Select Account
Click the user you want to change.
Change Account Type
Click Change Account Type button. (It may ask you for login, as confirmation. Login & proceed further)
Step 5
Choose Role
Select Administrator or Standard User, then click OK.
Tip: Repeat the steps and choose Standard User to remove admin rights.