Use the Settings app to turn off the touchpad or lock it down This article explains ... Right click the Start button on the taskbar. Select Settings. Choose Bluetooth & devices.

This Click Lock feature lets you highlight, select, and drag files, folders, and items without pressing down the mouse button ... pretty useful if you use the touchpad often, but it will take ...

There are some other causes such as accidentally triggering the touchpad lock button and misconfiguration in the touchpad or mouse settings. Also read: Touchpad driver not showing up in Device ...