I have a Samsung R480 laptop that has issues with the touchpad.
When I try to use the mouse touchpad it intermittenly works and/or doesn't respond properly. It's basically unusable. I decided to try an extrernal mouse and the laptop would not recognize it. I kept getting the USB device not recognized messege. I tried two other external mouses, and it still wouldn't recognize them. Every few minutes I would hear the USB connection sound indicating a USB device had been connected, but I wasn't connecting any USB devices to the laptop.
I've tried other USB devises on the computer like thumb drives and external hard drives, and they work fine.
I then tried to use the touchpad while the external mouse was connected. And the touchpad starting working. Not 100% working - still some delay and sensitivity problems, but usable.
So, the touchpad does not work properly when an external mouse isn't connected. The touchpad does work somewhat when an external mouse is connected, but the external mouse is not recognized by the laptop.
I've tried adjusting the mouse settings and I updated the drivers for touchpad mouse. Also, I just changed out the motherboard, because of a power jack issue, but there is still a problem with the touchpad - same thing was happening before and after the motherboard replacement. And I replaced the top cover of the laptop, which included a replacement touchpad.
Any ideas where to look next? Could this be a virus issue? Thanks!
Edited by fredsmythson, 02 April 2016 - 02:36 PM.