Acer Aspire 4720 Notebook "touchpad wont double tap" Questions

...wont work. However on pressing Ctrl +Alt (no del) the mouse works fine. Im a bit confused by all this.. does the beep code mean anything? why does the touchpad behave that way. I tired cleaning the ...

...touchpad is no longer responding to tapping, and the left click key is not responding. The right key and the cursor are still operating OK. USB mouse also works. regards David Duncan Hi there, I had ...