Windows 11 Apps have no response on the mouse input once the apps is open

[Craig WONG1]

My PC is running on Window 11. I can use a mouse to active any App from the desktop screen. Once the app is opened, the apps opened does not response to any mouse input. For example, I use mouse to double click MS Word icon on the desktop screen and the MS word screen pops up to prompt me open existing file or create new file, but the MS word has no further response to my mouse click even I use the mouse to click the upper right corner "minimize", "resize" or "close" button. But it has response to the Keyboard input, I use the Tab key to move around the MS word. I have tried to open more app

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