I have Inspiron 7359 2 in 1. 

My touchpad has not been functioning properly, I can see the pointer and use it a bit but it dances all across the desktop. Only a few seconds after restart or start of the windows it works then behaves strangely - No issues when I connect Bluetooth mouse or on the touchscreen.  I checked the device manager and see a failure in I2C HID Device. I have tried to uninstall and update the driver numerous times but it does not work. When I check for Touchpad in Mic and other pointing devices, it's not there. I also tried the regedit to check the Synaptics but I don't see that specific options listed under my Softwares. Please help !!!