Users who have enabled the disabled-by-default Administrator account in Windows 10 face the issue that Universal apps like Photos, Calculator do not work. Also, the new Start menu does not open. Any XAML/Modern app code fails to work. Here is a workaround to fix this issue.
Tag: enable administrator account
Enable or disable the Administrator account in Windows 10
The "Administrator" account is still present in Windows 10. Starting with Windows XP it is hidden from the login screen by default and starting with Vista it is disabled. Additionally, in Windows 10, even when you create a new admin-level account, it still requires UAC elevation. The default account named "Administrator" remains disabled and hidden. However, if you start Windows 10 in Safe Mode then it will be enabled and accessible. You can unhide and enable the Administrator account if you want to.
How to enable or disable the hidden Administrator account in Windows 8
The "Administrator" account is present in all versions of Windows based on NT but starting with Windows XP it is disabled by default. Additionally, in Windows 7, Windows 8 and Vista, even when you create a new admin-level account, it still requires UAC elevation. The default account named "Administrator" remains disabled and hidden. If you boot Windows into Safe Mode then it is enabled. However, you can unhide and enable the Administrator account if you want.