Why does the Intel® FPGA Download Cables drivers installation fail on Windows* operating system? - Why does the Intel® FPGA Download Cables drivers installation fail on Windows* operating system? Description Due to the expiration of the digital signature certificate of the Intel® FPGA Download Cable I (formerly referred to as USB Blaster I download cable) and the Intel® FPGA Download Cable II (formerly referred to as USB Blaster II download cable) drivers for Windows* operating system, the installation process of the drivers may fail. Follow the next steps to verify if the digital signature certificate of your driver has expired: Go to ' <Quartus Installation Path>\qprogrammer\quartus\drivers\usb-blaster-ii' folder Right-click on ' usbblasterii.cat' and select ' Properties , then select the ' Digital Signatures' tab Select the ' IFDLII Production Key1 ' signature from the ' Signature List' and click ' Details ' Click on ' View Certificate ' If the driver has expired, you will see the ' This certificate has expired or is not yet valid ' message Resolution A patch is available to fix this problem for the Intel® Quartus® Prime Software. Download and install Patch 0.02i for the Intel® Quartus® Prime Pro Edition Software version 20.4 and the Intel® Quartus® Prime Standard Edition Software version 21.1. Download and install Patch 0.02i for the Intel® Quartus® Prime Pro Edition Programmer and Tools or Patch 0.02stdp for the Intel® Quartus® Prime Standard Edition Programmer and Tools from the appropriate link below. Download Intel® Quartus® Prime Pro Edition Software version 20.4 patch 0.02i for Windows (.exe) Download the Readme for Intel® Quartus® Prime Pro Edition Software version 20.4 patch 0.02i (.txt) Download Intel® Quartus® Prime Standard Edition Software version 21.1patch 0.02stdp for Windows (.exe) Download the Readme for Intel® Quartus® Prime Standard Edition Software version 21.1 patch 0.02stdp (.txt) After installing patch 0.02i or patch 0.02stdp for Windows, follow the next steps to update the driver on the operating system: Connect your Intel FPGA download cable or Intel FPGA download cable II Open Device Manager window of Windows* OS Choose Windows Settings from Start menu > Type “Device Manager” into the search area > Choose Device Manager Find Altera USB-Blaster II under JTAG cables or Altera USB-Blaster under Universal Serial Bus controllers Find USB-Blaster or USB-Blaster II under Other devices Choose Altera USB-Blaster or Altera USB-Blaster II Right-click and choose Update driver from the context menu Choose Browse my computer for driver software on the Update Drivers window Enter the following path for the driver and enable; include subfolders - <Intel Quartus Prime software install directory>\quartus\drivers or - <Intel Quartus Prime Programmer install directory>\qprogrammer\drivers or - <Intel Quartus Prime Programmer install directory>\qprogrammer\quartus\drivers Click Next This problem is fixed starting with the Intel® Quartus® Prime Pro Edition Software version 21.1. Custom Fields values: ['novalue'] Troubleshooting 22012357003 22012709245 True ['novalue'] ['FPGA Dev Tools Quartus® Prime Software QUARTUS-ALITE', 'FPGA Dev Tools Quartus® Prime Software Pro', 'FPGA Dev Tools Quartus® Prime Software Standard'] 21.1 20.4 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']