yesterday I installed windows 7 ultimate after I had the enterprise version on this machine for a few months. the installation went smoothly and everything worked fine except for the finger detection of the screen(only the pen worked) and the bottom screen buttons for rotating and so.

so I started to install all the missing drivers dell recommends for this model on their site, but once I tried to install N-Trig degitizer driver the installation said it was unsuccessful and since then the touch stopped working completely! I tried system restore but it didn't help so I went on and formatted the harddisk completely once again and installed windows but that didn't work either.

I tried to install the N-Trig's driver but it was alarting for a fatal error and said that no device was detected.

same story with N-Trig rollback.

so I checked the device manager and saw an "unknown device" with VID and PID values set as 0000.

I figured the N-Trig driver might have messed with the device firmware or something and now it doesnt know it's ID and munufactor...

Is there anything that can be done? like forcing the N-Trig driver to install on this device or something?

please help!