Some users have reported issues with their touchpad following their upgrade to Windows 10. This problem can happen for a variety of reasons, but fortunately there are some easy ways to troubleshoot your touchpad and get it running properly again.
N.B. This tip applies to ELAN, ASUS, and Synaptics touchpad models.
On some laptop models, there exists a specific switch or Fn + function key combo (F3, F5, F6…) to toggle the trackpad on and off. Check to see if this keyboard shortcut is enabled.
Windows 10 Disabled the Touchpad
If the problem persists, click Start > Settings > Devices. Go to Mouse & Touchpad > Related Settings, and click Additional mouse options to open the Mouse Properties dialog box. This box will show you whether your touchpad has been disabled. If so, simply select Enable to get your touchpad working again:
Click Apply > OK to exit.
Windows 10 Installed an Incompatible Driver
During the upgrade process, Windows 10 will install new drivers on your system. In certain cases, these drivers may not compatible with your current hardware. Right-click on Start to display the Power User menu, and then select the Device manager. Expand the Mice and other pointing devices section, and then right-click on your touchpad > Properties:
Click Roll Back Driver and follow the onscreen procedure to return to your previously installed driver: