Win10 quasi-official version 10240 appears UAC window prompt problem

Win10 official version 10240 has been pushed, this version is considered by many people as the official version of Win10 RTM. However, Microsoft officials have not confirmed the status of the "orthodox" status, Win10 Insider member program leader Gabriel Aul said in the Microsoft blog that the Build 10240 version is closer to the RTM official version "more recently." Let's take a look at the details to get to know it!

▲Adjust UAC to "do not lower the brightness of the desktop" level
Overall, the Build 10240 version is very close to perfect, but there is still improvement space. After testing, this version of the user account controls the UAC function to have a bug. Specifically, if UAC is adjusted to “ only notify me when the app tries to change the computer (do not reduce the brightness of the desktop), Windows application (Modern application) if the administrator permission is required, the request dialog will be blocked After the requested Windows application window. The app window is unavailable due to approval by administrator privileges. Therefore, in this state, the user cannot move the window to expose the authorization dialog box, and the authorization request cannot be completed. The application can only be closed by the task bar or the like.

▲Moving the mouse to the “X” location will display the UAC authorization dialog
was found in the test Build 10240 replacement Win10 activation key, and in the application store to buy Win10 Pro key A problem. Both of these tasks involve Windows applications (“Settings> and “App Stores”), and the user is required to authorize the operation. After clicking, for example, "Change Product Key", I found that the window was suspended, but when I wanted to close the application through the taskbar window preview, I found that after moving the mouse to the close button of the preview window, "X", it appeared. UAC window preview. However, if you move the mouse to a position other than "X", the preview effect will disappear, so the occlusion effect cannot be removed, and the UAC authorization dialog cannot be called up by switching modes such as Alt+Tab.

▲In the control panel (Win32 program), the UAC notification level is raised, and the authorization prompt is displayed normally.
The problem is currently only found in Windows applications, and is limited to UAC that does not lower the desktop brightness” Notification level. Therefore, the user can avoid this problem by using the default UAC notification level (the desktop brightness is reduced when the notification occurs), but it is not recommended to turn off the UAC function to avoid increasing system security risks.