Win 10 left click on the start menu and there is no response. What should I do?

Right-click the taskbar and select Task Manager from the pop-up right-click menu, or press CTRL+ALT+DEL to open the Task Manager interface.

In the task manager window that opens, switch to the process tab, select the desktop window manager project, and then click the end process button to end this process.

At this time, the "Task Manager" warning window as shown in the figure will pop up. Just check the item "Give up unsaved data and close" and click the "Close" button.

At this point, the desktop window manager will automatically restart, and then you can use the start menu normally.

Method 2 (ultimate method): fix the failure that the start menu can't be opened by modifying the group policy.

Press Windows+R directly to open the running window, or click the Start menu and select Run Project from its right-click menu to open it.

In the opened group policy window, expand the items of Computer Management -“Windows Devices-Security Settings-Local Policy-Security Options, find the item of User Account Control: Administrator Approval Mode of Built-in Administrator Account on the right, right-click and select the item of Properties from the right-click menu.

This will open the User Account Control: Administrator Approval Mode for Built-in Administrator Account property window, select the enabled item, and then click OK. As shown in the figure:

Next, as long as you restart the computer, you can use the start menu normally.

Right-click the start menu and select "Shut Down or Logout"-"Restart" from the right menu to restart the computer.

Method 3: 1. If none of the above methods can solve the problem that the start menu cannot be opened, we need to "reset the computer":

Open the Run window, enter "msconfig" and press Enter to open the System Configuration Utility.

2. From the open system configuration window, switch to the startup tab, check the safe startup items, click the OK button, and restart the computer to enter the safe mode.

3. In the "Safe Mode" interface, enter the "Settings"-"Update and Security" interface in turn, switch to the "Restore" tab, click the "Start" button under "Reset this computer" to reset the system and restart the installation of Win 10.

4. If you can enter the "Troubleshooting" interface, directly click "Reset this pc" to reinstall the official version of Win 10 system.