1, may be the touchpad driver is damaged or accidentally unloaded off.
2, the notebook touch pad is closed.
3, the computer virus causes.
4, Notebook Touch board failure, (such as water, internal foreign bodies, etc.).
If a touchpad failure occurs suddenly during use, you can restart the computer to try, because some programs run errors, resulting in memory run error will also appear temporarily touch board phenomenon, if the problem is still, restart the computer again, and then press F8 to enter Safe mode to start, select the last correct configuration to boot into.
If the above method still does not apply, then carries on the virus to examine, uses the anti-virus software to carry on the whole scan to the computer, does not detect the suspicious virus, needs to focus examines the following two aspects:
① first check that the Touchpad feature on the notebook is locked off.
If you accidentally operate a computer, if the touchpad is turned off by mistake, the touchpad may be turned off, so when the touchpad is unavailable, try pressing FN+F6 to open the touchpad (note: Some notebooks may be fn+f6 turned on or off, but there are also some brand notebooks that are not the same, Specific users can refer to the corresponding brand model notebook manual, or search for information.
② detect if Touchpad drive is normal
You can first use the drive Life 6 Uninstall the original Touchpad drive, and then again test the computer driver, the Touchpad driver update, restart the computer after the touchpad is available.