I recently updated our lighting computer to Windows 7. I took special care to obtain a 32 bit version of Windows, knowing that SIUDI5 interfaces do not support 64 bit operating systems.
Prior to installing the software/driver, I saw in Device Manager that the interface was being detected and properly named, although missing a driver.
After installing the driver however, not only the interface failed to be detected but an "Unidentified Device" appeared in Device Manager in place of the interface.
I am 100% sure that the operating system is 32 bit as I took care to obtain a 32 bit copy from our site license.
I have tried unplugging the device, plugging the device into a different USB port, etc..