Welcome Max Chung,
Thanks for reaching out to Microsoft Q&A Forum. I understand your mouse pairs, moves the pointer and scrolls normally, but clicking does nothing and makes no clicking sound unless you press very hard.
To help narrow this down, could you please confirm:
- What brand and model is your mouse, and is it a Microsoft mouse?
- Does the problem affect only the left button, only the right button, or both?
Please make sure you already tried the Q&A Assist amd Independent Advisor steps above . In addition, please try the following:
1, Make sure ClickLock is turned off
- Press Windows + R, type main.cpl and press Enter.
- On the Buttons tab, clear the Turn on ClickLock checkbox, then select Apply and OK.
2, Make sure Mouse keys is turned off
- Open Settings, then Accessibility, then Mouse.
- Turn off Mouse keys.
3, Check the power source
- Replace the batteries with new ones, or fully charge the mouse if it's rechargeable.
- Low power can make a mouse respond unreliably.
4, Reset the button settings in the mouse software
- If the mouse uses its manufacturer's app, such as Microsoft Mouse and Keyboard Center, open it and make sure the buttons are set to their default actions.
- If there's a firmware update for the mouse, install it from the app.
Looking forward to your update.