Left Click Not Working? Here's What to Do

Left click is the one button you can't live without. If it stops working, don't panic. Run through these checks in order.

Test the Button

Open the mouse button test. If left click doesn't light up, try a second mouse. If the second mouse works, it's your mouse. If not, it's the computer.

Check Settings

• Make sure the primary button isn't swapped to the right in your system settings.
• Turn off ClickLock (Windows mouse settings).
• Restart Windows Explorer, or restart the computer.

If It Only Works Sometimes

Intermittent clicks, double-clicks or drags that drop are signs of a worn switch. Check with the hold test and the double click test, then clean or replace the switch.

Left Click Not Working at All

If left click does nothing anywhere, start with the basics. Is the mouse connected? Try another USB port, a fresh battery, or re-pair it if it's Bluetooth. Does right click and movement still work? If they do, the problem is specific to the left button. Check that buttons aren't swapped in your system settings: on Windows, Settings, Bluetooth & devices, Mouse, Primary mouse button. On Mac, check System Settings, Mouse. Then test with the button test.

Left Click Works Sometimes

Intermittent left click is almost always a worn switch. It might fail on light presses but work when you press hard, or fail when you hold it. That's the same wear that causes double-clicking, just showing up differently. Cleaning can help for a while, but the long-term fix is replacing the switch or the mouse. Our double-click fix guide covers the same repairs.

Left Click Works in Some Apps but Not Others

If left click works on the desktop but not in a game or app, the app is the problem. It might be running as administrator while your mouse software isn't, which can block input. It might also have its own mouse settings. Try running both at the same permission level, and check the app's input settings. Some anti-cheat systems also block mouse software features like macros.

Windows: Restart Explorer

Sometimes Windows Explorer itself stops responding to clicks while the rest of the system works. Press Ctrl+Shift+Esc to open Task Manager, find Windows Explorer, and click Restart. Your taskbar will disappear and come back, and clicks often start working again. If this happens often, check for Windows updates and driver updates.

Laptop Touchpad Left Click Not Working

On laptops, the touchpad left click can fail separately from an external mouse. Check that the touchpad is enabled, that tap-to-click is on if you use taps, and update the touchpad driver. Physical clicks that stop working can be caused by debris under the touchpad edge or, rarely, a swollen battery pushing up from below.

Final Thoughts

If you rely on your computer for work, keep a cheap spare mouse in a drawer. When your main mouse fails, you can keep working while you fix or replace it, and you can also use the spare to quickly rule out computer-side problems.

Try It Now

Test your left click now.

Software or Hardware? A Quick Way to Tell

Start with the mouse tester. If the left button lights up every time, the hardware is working and the issue is a stuck app, a game setting or a driver.

Windows Fixes for a Left Click That Stops Working

1. Press Ctrl + Shift + Esc and restart Windows Explorer.
2. Turn off ClickLock in Mouse settings.
3. Check that the primary button isn't switched to right.
4. Uninstall the mouse in Device Manager and restart.
5. Close mouse software and macro tools, then test again.
6. Install the latest version of your mouse software.

When It's the Switch

If the left click works sometimes, double clicks, or drops your drag halfway, the switch is wearing out. Confirm it with the double click test and the drag test. Use your warranty if you can. If not, a replacement switch costs very little and most repair shops can fit it.

Quick Summary

• Test the left button online to rule out software first.
• Restart Explorer and turn off ClickLock in Windows.
• Try the mouse on another PC to find where the fault is.
• Double clicks or dropped drags point to a worn switch.
• Use your warranty, or replace the switch if it has expired.

Preventing Left Click Problems

Left click gets more use than any other button, so it wears first. A few habits help it last. Keep the mouse clean, so dust doesn't get under the button. Avoid slamming the button in games: a light, quick press is faster anyway. If your mouse has adjustable debounce, don't set it lower than you need. And test it every few months with the double click test, so you catch early chatter before it becomes a daily annoyance. When it's time for a new mouse, consider one with optical switches.

Summary

• Check connection, battery and button swap settings first.
• Use the button test to see if clicks reach the computer.
• Intermittent clicks mean a worn switch.
• App-specific problems mean app settings or permissions.
• Restart Explorer if Windows stops responding to clicks.

If the switch is worn, the repairs in our double-click guide apply here too.

Left Click Problems With Bluetooth Mice

Bluetooth mice can lose clicks when the connection is weak or the battery is low, even though movement still works. Move closer to the computer, replace the battery, and remove other Bluetooth devices you aren't using. If clicks still drop, try re-pairing the mouse. Some Bluetooth mice also go into a power saving mode where the first click only wakes them up, so it looks like a missed click.

Frequently Asked Questions

Related Guides

• How to Fix a Mouse That Double-Clicks
• Mouse Side Buttons Not Working?
• Why Your Scroll Wheel Jumps (and How to Fix It)