There are several possible causes for a mouse not working.
1. Poor Batteries or Faulty Power Connection: Batteries in wired and wireless mice can wear out over time, or the power connection for wired mice can be faulty. If you are using a wired mouse, check that the wire is securely connected to the PC. If using a wireless mouse, it might help to replace the batteries.
2. Corrupt or Outdated Drivers: If you recently installed a new program or updated Windows, your drivers may have become corrupt or outdated. Drivers in your operating system control the functioning of hardware devices, including your mouse. It could help to reinstall the drivers or update them if they are outdated.
3. Dirt & Dust: Mice are exposed to dirt and dust so it’s important to clean them regularly. Over time, dirt and dust can build up and interfere with their operation. Check the inside of the mouse and remove any dirt or dust that is blocking the sensors or preventing the buttons from moving properly.
4. Physical Damage: If your mouse has been dropped or jolted, it could be damaged. Check the mouse for any broken or loose pieces, or any other signs of physical damage. If there is damage, try to repair it with electrical tape or by cleaning it with a soft cloth.
5. Foreign Objects: Small objects such as paperclips and coins can get stuck inside the mouse. These can create problems with the buttons or sensors. Carefully inspect the mouse for any foreign objects, and remove them if you find any.
6. Interference from Other Devices: Wireless mice can be affected by interference from other wireless devices in the area. Move the mouse away from other devices or choose a different frequency for your mouse if you are using a 2.4GHz model.
7. Bad USB Port: If you are using a wired mouse, the USB port could be bad or faulty. Try plugging the mouse into another USB port on your computer and see if it works.
8. Software Issues: If none of these solutions have solved the problem, a software issue could be causing the issue. If a program was recently installed or updated, try uninstalling it or reinstalling it to see if the mouse starts working again.
Hopefully one of the solutions above will help solve the problem with your mouse not working. If not, take your mouse to a tech store to have them check it for any serious issues.