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Two different ways to do it...
1. Use your function keys... Combination of the Fn key (next to the Alt Key) and one of your "F" keys, look on your F-Keys you will see icons.. Look for the Touchpad Icon
Then Press Fn and Corresponding F Key at the same time to Enable/Disable Touchpad...
Go to Dell.com scroll to bottom of website's home page and look for: SUPPORT AND DRIVERS.... Click on the Text and It Will Then Ask You To CHoose ... LAPTOP, or Desktop, or Tablet etc.... You Choose LAPTOP..... THen Choose THe Model from the list, then choose the model number from the list and it will then take you to Your Laptops Drivers Page... Scroll Down and Find Your Touchpad Driver and Redownload it and install it....
You will need to go to the support section over at Dell and enter in your service tag from the bottom of the laptop. You then need to look in the "drivers" section and download the Dell Synaptics Touchpad drivers and install them. That should bring your scrolling area of the touchpad back to life.
Try using your touch pad when your laptop is running on batteries (while power supply is disconnected).
Many of new power supply supplied with dell laptops are faulty and cause touchpad to work erratically/horribly
Same thing here, I can not find out how to diable the touch paid. I spent an hour chatting on-line with Dell Tech support and they did nothing to help!! I am starting to think it can not be done on this machine. Please someone tell use how to do this?
I have a similar symptom, that is, apparent loss of scroll ring functionality as homercles1 noted, but in fact the scroll ring functionality gets toggled between horizontal scrolling and vertical scrolling as Rithas has noted. A window that is not wide enough to require horizontal scrolling will give the appearance of loss of scroll ring functionality when the scroll ring is in horizontal scroll mode. Likewise, a window that is not tall enough to require vertical scrolling will give the appearance of loss of scroll ring functionality when the scroll ring is in vertical scroll mode.
Solution that worked for me:
My upper right-hand button is defined as "Allow Horizontal Scroll" and by clicking this button, the scroll ring function toggles between horizontal and vertical scrolling. In fact, what can appear to be a nonfunctional scroll ring in some windows is very useful when moving around in large windows.
Hope this comment will be useful to you.