UPDD driver version 5
Under Windows Vista and above UPDD installs a virtual HID device driver upddvh.sys to provide the pen / tablet services used by the UPDD “extended touch” mode.
This driver explicitly sets high security level access as recommended by Microsoft best practice for mouse class drivers.
We are aware that once this is done Windows changes the default security level access for the all mouse class drivers and this may have a profound effect on legacy touch screen drivers that may be installed to support other touchscreens.
Following the install of UPDD any user mode applications associated with mouse class device drivers, such as calibrate or system tray utilities, might fail when requesting a handle to their device drivers due to the increased level of the security for the mouse class drivers.
When uninstalling UPDD Windows does not revert back to the original security access level.
Possible solutions:
1) Change user mode programs to request a handle in such a manner that will work with secure access rights.
2) Change the driver to define an appropriate/lesser level of security to allow the user mode apps access.
3) Instruct UPDD not to install the Virtual HID driver, restricting touch interface to the mouse port interface only.
4) Utilise a UPDD Virtual HID that sets a lesser security access level
5) Install a UPDD driver to support all touch screens utilised on the system.