Fix touchpad problems in Windows - Microsoft Support
http://go.microsoft.com/fwlink/?LinkID=617350
WebOpen Device Manager. To find touchpad devices, select Human Interface Devices or Mice and other pointing devices, then right-click the device you'd like to update. Select Update Driver. Reinstall touchpad drivers. Open Device Manager. Right-click the name of the device, then select Uninstall device. Select Uninstall and then restart your PC.
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