Keep in mind that some problems can be spotty or intermittent, especially if the hardware is just starting to fail. If you have a wireless mouse with a USB dongle, move the dongle to another USB port. There could also be a problem with a USB port on your system-if it’s a wired mouse, try plugging your mouse into another USB port. If both mice have the same strange left-click issues, there’s definitely a software issue with your PC. Does it have the same problem? If not, there’s likely a hardware issue. You can also try connecting another mouse to your current PC. If the mouse works perfectly on another computer, there’s a software configuration issue with your current computer. If the problem is the same when the mouse is plugged into another computer, you know you have a hardware problem. If you have a wireless mouse, either plug its RF dongle into another computer or pair it via Bluetooth with another computer.

There’s an extremely easy way to check whether you have a hardware issue or a software issue: Unplug your mouse from your current computer, plug it into another computer, and test the left-click button. If the mouse’s left-click button doesn’t work, only sometimes responds, accidentally “unclicks” as you drag, misclicks, or double-clicks when you click once, that’s a pretty good sign there’s something wrong with the hardware in the left-click button itself. In our experience, most mouse left-click (or right-click) issues point to hardware failure. It’s Probably a Hardware Problem Here’s How to Check

Dell mouse not working