|You may have stuck keys or liquid may have spilled on the laptop keyboard. The internal will still effect the machine with the external plugged in. If this is probable in your case then the laptop needs to be taken apart and the keyboard parts needs to be cleaned with rubbing alcohol. If this does not sound likely then you might want to try reinstalling the latest drivers for your machine, delete the keyboard in device manager and restart the machine so Windows will reinstall the device with the new driver.|
You have to be a little bit crazy to keep you from going insane.