I'm pulling my hair out!  Wife's Inspiron One 2320 All-In-One  with Windows 7 64 bit has lost its touch screen function.  I've tried going into control panel and rechecking the touch options and re-applying but it doesn't work.   Everything in the pen & touch is set correctly.  Dell Stage is up and running. Been looking around at the display settings and I see the monitor listed as a PNP monitor.  Shouldn't that be listed as a touch monitor?   I also can't calibrate the touch options because a touch to the screen don't register to move the crosshair to the various points on the screen.  Is there something I can reinstall to activate the touch function?  I've tried restoring to all the earlier restore points but nothing corrects the problem.