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Sometimes the touchpad on my Dell Inspiron N5110 stops working and I need to restart the computer to get it to work again. What should I do?

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Your question was almost unreadable. I've edited it for you, but please try to make your questions easier to read with better spelling and grammar. – bwDraco May 2 '12 at 17:47

Uninstall the driver that DELL has pre-installed and install the synaptics touchpad driver. What you will get from that is a good response of the touchpad but without the features of the synaptics touchpad, for example scroll.

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Try updating your Touchpad driver

Support page for your model, bookmark it for later reference

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