Is it true that the InstanceID for a usb device should be the device's serial
number? We manufacture a composite device that includes a unique serial
number, it's verifed with the latest USB command verifier, but the instance
ID in Windows is not the serial number but a unique identifier generated by
Also, where can I find information on the Microsoft-Defined OS Descriptors
for USB devices. In both the WDK and the prior DDK, it states to go to
microsoft.com/whdc, but I can't find any information about them.
Any help would be appreciated.