First rule out whether it is because you accidentally turned off the touchpad. Generally, there are shortcut keys on the keyboard; it may be because the touchpad driver is damaged, you can restart the computer; it may also be caused by hardware damage. The following is a detailed introduction:

1. The touchpad driver may be damaged or the user accidentally uninstalled it;

2. The laptop touchpad The board is closed. Some notebooks can turn off the touchpad through settings, so if you accidentally turn off the touchpad, it will naturally cause the touchpad to malfunction;

　3. Caused by viruses in the computer;

4. Notebook The touch panel is faulty (such as water intrusion, foreign matter inside, etc.);

5. You can try to select [Control Panel]-Select Select [Printers and other hardware], click [Mouse] and select the device settings in the pop-up mouse properties window; then click OK in any of the two items after selecting the touchpad icon; then the tray area in the lower right corner of the desktop will When the touchpad icon appears, right-click on the icon and select [Tap instead of keystroke], and that's it;