Although this did work and I was able to access the instrument with ArgyllCMS, restarting or going to standby/shutting down the system always results in a bluescreen, because apparently libusb causes some issues when used in this environment.
I haven't seen such behaviour. You weren't using the filter driver were you ? It is known to have problems.
Those drivers install without problem, but unfortunatelly, even though I now have a libusb-device called X-Rite DTP94, ArgyllCMS does not recognize the device.
libusb 1.0 has a different API, and Argyll would need to be linked to a different stub library in anycase. libusb 1.0 doesn't solve all the problems anyway - the i1pro Rev D is incompatible with MS's winusb, and winusb isn't available for Win2K (Which I intend to support). One approach would be to try using the libusb0.sys that has been signed by PRUFTECHNIK (ptlibusb0.sys). Otherwise you will have to wait until I do the next release, which has been modified to use libusb 1.0, with an MSWindows back end that supports both libusb0.sys and winusb.sys. Graeme Gill.