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Altera_Forum
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16 years ago

USB Blaster shown as "Unknown Device"

Hi there, We have a few labs that run Quartus 9.1 SP2 and students can connect up DE2 boards and other USB Blaster devices. All machines are running Windows XP with SP3. Lately I noted th...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Guess this could be related to a number of problems.

1: Have you tried reinstalling the USB Blaster driver device driver software on the affected machines?

2: Have any recent system policies been implemented on the network preventing USB plug n play and/or disabling custom device drivers?

3: How many machines are affected? Very unlikely, but could be a general Windows USB driver problem or issue with the hardware USB controller on the PC motherboards. However very unlikely if multiple machines are affected, and most likely a software-related issue!