What Can I do, My laptop Mouse Touchpad Is not working?

When you find that the laptop touchpad has  stopped  working there are few things you can try to fix the problem, below are some technical sugestions that you can follow

Check other Peripheral devices 

Some Peripheral devices and PS/2 devices, especially any USB input device(including a computer mouse) can disable the touchpad. As a troubleshooting step turn off the computer, disconnect all USB devices, and then start the computer again to make sure no other device is disabling the touchpad. If this fixes your problem, but the touchpad is disabled again the next time you connect the device check your touchpad software settings for a setting that can prevent this from happening.
Check mouse settings

Check the mouse settings

By entering into the Windows Control Panel, access the mouse settings and check if the touchpad is enabled. Also, you can adjust the sensitivity of the touchpad to work best for your fingers. 

Check the device manager

Open the Device Manager and check through the device list and find the touchpad. Check to see that it is enabled. If disabled, re-enable it and test the touchpad. If it is already enabled, change it to disabled, then re-enable it again. Sometimes toggling this setting can kick-start the touchpad into working again.

Check CMOS (BIOS) setup

If there are any yellow exclamation marks, red X's or "Other devices" in Device Manager, any of these errors can indicate there is a problem with hardware in your computer that may be causing the touchpad problems.
Identifying problems in Windows Device Manager.
Check CMOS (BIOS) setup

Make sure the touchpad has not been disabled in the CMOS (BIOS) setup. In the setup check the hardware device settings and see if the touchpad is enabled or disabled. If disabled, re-enable it, restart the laptop, and test the touchpad.
How to enter the BIOS or CMOS setup.
Software driver issues

Check the software driver issue 

If the above options do not fix the problem, the software driver for the touchpad may be corrupted or not updated enough to work correctly. It is recommended that you visit the laptop manufacturer's website and download the most current touchpad driver for your specific laptop model. Install the driver, restart the laptop and test the touchpad to see if it works.
Hardware defect

Check the Hardware defect issue

Lastly, if the touchpad still is not working correctly or at all, you may need to take it to a computer repair shop and have it fixed. It could require a replacement of the touchpad itself or another component in the laptop. If the touchpad cannot get repaired, you can keep an external mouse connected to the laptop as as an alternative solution