If possible, use another working mouse/keyboard with this PC, till you fix the problem. Read: How to log into a Windows computer without Keyboard. If your Keyboard or Mouse not working in Windows ...

here are suggestions that will help you fix the mouse left-click button not working problem. First, make sure that the device is in working condition. You may try it on another computer and see.

This also tends to fix issues with your cursor disappearing ... A near-depleted battery can prevent your mouse from ...

You can use them to connect all kinds of devices, from basic peripherals like mouse and keyboards to printers ... as it is possible to fix the underlying issue with a bit of troubleshooting.