I can't get my USB Blaster to be recognized by the Quartus Prime 18.1 Programmer.

Hi,

please perform the below things once again from link below,

https://www.intel.com/content/www/us/en/programmable/documentation/nfa1418282998564.html

1. Installing the Intel FPGA Download Cable Driver on Windows
2. Connecting the Intel FPGA Download Cable to the Board
3. Setting up the Intel FPGA Download Cable Hardware in the Intel Quartus Prime Software
4. After this, if issue still persists then provide these all details like Quartus Edition(lite/pro/std), Kit/board & importantly screenshot of device manager.
5. If possible perform same experiment on different machine(Windows 10) with stand alone Quartus programmer( download it from below link, as shown in screenshot as per your requirement)

http://fpgasoftware.intel.com/18.1/?edition=lite&platform=windows&download_manager=dlm3&product=qprogrammer#tabs-4

Regards,

Vicky