If the touchpad device is not working correctly, you can try updating the drivers. In the HID-compliant mouse Properties window, check the Device status to see if it states, "This device is working properly." If it states anything else, then there is a problem with the touchpad. When you find the HID-compliant mouse entry for the touchpad (the non-USB entry), click the Properties button. Click each entry to find the one that does not have a USB in the Location property. If you have a USB mouse connected to your laptop for troubleshooting purposes, you may see two HID-compliant mouse entries. Check for an entry in the Devices list named HID-compliant mouse. In the Mouse Properties window, click the Hardware tab. If you do not see a touchpad tab in the Mouse Properties window, try the following steps. Adjust any other settings to your liking, then click Apply, then OK. Ensure there is a check in the box next to Enable touchpad. They are usually under the far-right tab next to Hardware (the tab's name varies from manufacturer to manufacturer). In the Mouse Properties window that opens, locate your touchpad settings. If the Control Panel View by option is set to Small icons, click the Mouse option in step 2 above. Turn on or enable touchpad in touchpad settings If this fixes your problem, you can reconnect the USB device to continue troubleshooting or changing settings discussed in the next sections. As a troubleshooting step, turn off the computer, disconnect all external devices, then start the computer again to ensure one of them has not turned off the touchpad. Some USB input devices automatically disable the touchpad when connected. If your laptop has this feature, press the button or keys to turn the touchpad on and off a few times. Some laptops have an Fn key + function key combo to enable and disable the touchpad. What should I do when a computer freezes or locks up?. To check for this issue, try pressing the Windows key to see if the Start Menu opens. 
In this case, the touchpad would also not be working. It could be that the computer is frozen, meaning it is not responding to any commands you give it.
The first thing to check is whether the computer and the operating system is not responding as well. If you cannot get an external mouse to function, see: How to navigate Windows using a keyboard. To perform some of the troubleshooting options on this page, you need to connect a USB external mouse.
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