Why is Altera® USB Blaster not detected by Quartus® Programmer when it is recognized correctly in Device Manager? - Why is Altera® USB Blaster not detected by Quartus® Programmer when it is recognized correctly in Device Manager? Description The version of JTAGServer running as a host is not working properly as a user mode application. Resolution To resolve this problem, use the following steps: 1. Run Windows in SAFE MODE 2. Run “msconfig” in command prompt to bring up System Configuration Window 3. In Service tab, disable “Altera JTAG Server” and then reboot the PC. Custom Fields values: ['novalue'] Troubleshooting FB: 537160; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 16.1 ['Programmable Logic Devices'] ['Stand-Alone Programmer 10.23 (For Legacy Max+Plus® II Software)'] ['novalue'] ['Download Cable PL-USB-BLASTER-RCN']