usb-blaster-ii driver installation trouble. - usb-blaster-ii driver installation trouble. I need to work with Quartus Prime Lite version 19.1.0.670 (required by a customer). I have installed the software, but cant get the usb-blaster-ii driver to install. I found this article: https://www.intel.com/content/www/us/en/support/programmable/articles/000074130.html but this patch is for version 19.1.0.230 or something like that. When I try to install the patch I get a message that it's for the wrong software version. How do I find the patch that will allow me to install the driver for version 19.1.0.670? Replies: Re: usb-blaster-ii driver installation trouble. I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Replies: Re: usb-blaster-ii driver installation trouble. Installing https://www.intel.com/content/dam/support/us/en/programmable/kdb/support/knowledge-center/tools/2021/quartus-0.0-0.02i-windows.exe solved my problem. Thank you! Replies: Re: usb-blaster-ii driver installation trouble. Hi, Thank you for contacting Intel community. That might be due to problem with USB Blaster. Kindly follow the workaround in KDB below, download and install patch of Standard edition Quartus to be use with Quartus lite. https://www.intel.com/content/www/us/en/support/programmable/articles/000086243.html Regards, Aiman