The “rev 10” in the search query refers to a specific hardware revision of the device’s internal USB-to-serial bridge chip. Unlike later revisions that used standard, Microsoft-signed drivers, rev 10 sat at an awkward crossroads. It was released just before driver signing became mandatory for 64-bit versions of Windows. Consequently, it uses a proprietary, unsigned, and now-orphaned driver from FTDI (Future Technology Devices International) or a Delphi-customized version.
claim to offer Windows drivers for Delphi devices, use caution and prioritize manufacturers' official sites to avoid "Potentially Unwanted Products" (PUPs). How to Identify Authentic Hardware Counterfeit versions of the delphi 100 251 rev 10 driver download new