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Does the Icon for unknown device disappered in the device Manager (the USB Blaster should show up as a device under "USB Controller")?
If you click on "Hardware Setup" in the programmer window does the USB Blaster show up (you need to choose it once to indicate which programmer to be used, even if there is just this one connected). If the USB Blaster shows up in the device manager but not in the programmer window, the JTAG Server seems to fail. There was a Problem with the Installation files for the IIRC 12.x Quartus Version if used as WebEdition on 64Bit OS. The webEdition was the 32Bit Version with the JTAG Server not starting under 64Bit OS. But this was fixed with 13.x...
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The unknown device does not disappear in the device manager even when the cable is disconnected. I have attached the screen-shot as device_manager.jpg. This shows up as two devices when any one is clicked it shows that the drivers are not installed. Under USB Controller the device does not show up. I have attached another screen-shot.
If I click "Hardware Setup" in the programmer window the USB Blaster does not show up. Previous post's screen-shot. I tried with both Quartus II 12.0 and 13.0. Both are giving same problems. Now I am trying to install the driver in the device manager. I tried to install it from Quarus II 13.0sp1-->quartus-->drivers-->usb-blaster. But required files are not there as prompt shows.
Thanks a lot for your help. If you can suggest any document that explains what this driver does, it will be of great help. In a CD, there are drivers for DE2 and in the installation folder there are drivers for quartus II. I am not getting which folder to use.
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