I don't know for sure, but I think the problem is our Delcom USB drivers are not digitally signed. Actually we didn't write the WinUSB drivers--Microsoft did; we only generated the CAT and INF files that provide the information to Windows to associate the Delcom USB interface to WinUSB. With XP, the OS didn't care that the CAT/INF files weren't signed. With Vista/Win7, the OS complained, but allowed the user to continue with the installation. As I understand it from reading the web, Win8 won't allow installation with unsigned CAT/INF files, even though the WinUSB files themselves are signed by Microsoft.
Why aren't the Delcom WinUSB drivers signed? Because at the time we generated these, it cost $2000 to get a certificate. It appears that the cost of the certificate may have fallen to around $200 now, but I don't remember how to construct the CAT and INF files anymore. So there is likely quite a bit of labor involved also.
Of course, we don't know for sure if signed drivers would provide a functioning interface in Win 8, or with the newer hardware that is likely being used with Win8.
Beta Test: Using JP1 (EEPROM) with 64-bit Vista/Win7
Moderator: Moderators
Here's how to disable the digital signature nonsense in Win 8:
http://sixcolumns.com/t/how-to-disable- ... ws-8/151/2
http://sixcolumns.com/t/how-to-disable- ... ws-8/151/2