# Quartus II: USB Blaster not found, even after installing the driver

I've purchased this USB blaster: https://www.amazon.com/dp/B07F5H5LPZ/

Because I have this Ep2c5/ep2c8 dev board, I've been following this video to begin my work with FPGAs: https://www.youtube.com/watch?v=le6Jo5DpLao

Here is my problem. After connecting the USB Blaster to my Win7 computer for the first time and installing the driver from altera\11.1sp2\quartus\drivers, the USB Blaster shows up in the control panel as "USB-Blaster(Altera)" but Quartus II doesn't show it in the Programmer's Hardware Setup page.

In troubleshooting, I also tried installing the same version of Quartus II and the USB blaster on my Win10 laptop, but the driver isn't signed for win10 so I dropped that approach. Back on the Win7 computer I tried using the command prompt to open altera\11.2sp2\quartus\bin\jtagconfig.exe and saw it read out the message "No JTAG hardware available".

Is there something obvious that I'm doing wrong here? Do I have a bunk USB Blaster? Do I have the wrong hardware or software altogether?

I found out while using Quartus Standard, the answer is to disconnect other USB devices and the blaster is seen again by Quartus

[Win10]

I had this problem with the Blaster II. It would show up as "Altera USB-Blaster II (Unconfigured)" even after I installed the drivers.

On Quartus Pro 20.4, the chip programmer GUI would not see this device. I solved this by running the chip programmer GUI as administrator. Once the program launched, I could hear the typical USB connect/disconnect ding-dong sound effects from Windows. Then the device showed up in the programmer and it worked fine. In device manager, its new name was "Altera USB-Blaster II (JTAG interface)". After that, I didn't have to run the programmer as administrator to connect.

Installing Quartus ii 13sp1 solved the issue. I got by using the newer software+newer driver.

• Sometimes one line answers are acceptable, this is what fixed the issue and it works. Sep 26 '20 at 16:26

Try this solution:

1. Open regedit.exe
2. Delete the whole \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceClasses\{219d0508-57a8-4ff5-97a1-bd86587c6c7e} key
3. Reconnect USB Blaster
4. Press "Hardware Setup" button in Quartus Programmer.
5. If there is USB Blaster select it and enjoy. If it still not detected reboot your PC.