My laptop touchpad left mouse key not working

I have a Elitebook 8440p with windows 7 professional.The touchpad left mouse key not working ,but right mouse key works well.my driver is synaptics 14.0.10 090ct09 and the touchpad name is synapticsTouchPadV7.2.
thanks in advance.
wy

i had the same problem. what solved this for me was to simply go to device manager and under mice and other pointing devices uninstall the touchpad, i had a usb mouse handy just in case i needed it, but then i restarted the laptop and it auto reinstalled touchpad for me and then all options worked on startup.

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I would also like to add that I've reverted the two cd drive and hard drive mods I did and the laptop is back to factory hardware and there is 0 corrosion or mold visible.

My laptop touchpad left mouse key not working

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