Satellite U500/01C N-Trig DuoSense

Hi,
I recently purchased a brand new U500/01C ([PSU9BA-01C002|http://www.mytoshiba.com.au/products/notebooks/satellite/u500/psu9ba-01c002]) notebook computer with a N-Trig DuoSense digitizer (multitouch display) device built in. The device and software were working _perfectly_ up until about a week ago, when the software started displaying a notification window when opened "No devices found." The touch still works, however the functionality is limited (no multitouch or advanced gestures, etc.) and I can no longer calibrate the screen.
Despite the software reported no devices found, the hardware still shows up as installed and working properly in Device Manager; I have three entries under Digitizers: HID-compliant device x2 and N-Trig_DIGITIZER.
I have been troubleshooting and trying to solve the problem for the past week to no avail. I have tried uninstalling and reinstalling the software, uninstalling and reinstalling the drivers, removing the devices from Device Manager (including deleting drivers) and reinstalling, System Restore to multiple different restore points, reinstalling a fresh copy of Windows 7 from a retail disc and restoring the factory defaults from the TOSHIBA partition.
I have also searched everywhere I can think of for updated or even previous drivers but neither the [TOSHIBA website|http://www.mytoshiba.com.au/support/notebooks/satellite/u500/psu9ba-01c002/download] nor the [N-trig website|http://www.n-trig.com/CONTENT.ASPX?Page=Multi_touch] appear to have drivers for this model. The software/drivers I have been using are found in Start > All Programs > TOSHIBA > Applications and Utilities. They are version 2.224.
I have only tried 64-bit operating systems as I want to utilize all 4GB of memory. I have not yet tried a 32-bit installation.
Where should I go from here? I have contacted N-Trig but have not yet got a response. Is there a TOSHIBA support email I can write to? Should I try a 32-bit installation? Are there alternative drivers available anywhere? Have I got a faulty product?
Thanks in advance!

Hi Jim,
Thanks for the suggestion, I can't believe I missed it (I was only searching TOSHIBA Australia I think)
I have tried these drivers but there is no difference. Also, these drivers were apparently older than those that came prebundled with the computer (2.181 vs. 2.224).
I am surprised than not even a fresh install of Windows (retail) nor restoring the computer to the out of box state have made any difference.
I still only have one touch point and still cannot calibrate or activate multitouch under the software (still get the "No devices found" window).
Hopefully there is a solution out there.
Thanks, Tim.

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