I am trying to install a usb composite device I build on Windows 7(32bit & 64bit) and Windows8/8.1(32bit & 64bit).
The device composes of a Mass-storage and CDC Serial port device. I have provided an INF file to make Windows recognize the main composite device. Once that is recognized, I also provide INF for the CDC serial device. The mass-storage part functions without need of a INF file.
Now these INF files uses drivers that normal default Windows drivers.(usbccgp.sys, usbser.sys) Even when using these "default" drivers and not changing anything in them, do I still need to get a digital signature to install this device? Is there anyway to write the INF so as to bypass this error?
Thanks
Signatures are enforced when installing the drivers in 64-bit Windows. The drivers won't work without being signed. And once you have a proper certificate (note that not every code signing certificate will work), you can sign both the driver and cat file (if used) with this certificate.