usb driver not working in quartus 12.0

[Altera_Forum]

usb blaster drivers are not working with quartus 12.0 . it is giving "internal error 82". I install DLL file in "bin " folder still it is not working. 

drivers shows it is updated properly but while dumping program "no hardware". please give me possible solution.

[Altera_Forum]

Make sure that : 

_ you don't have any multiple quartus version conflit _ you specified the correct path for all the environment variables  You can try to stop the automatic driver installation, and then install/update the driver by your self, with the correct version of driver.  regards,

[Altera_Forum]

A couple of points that might be helpful to the reader of your post (for future reference): 

 1. what version of Blaster? Whose version of the USB drivers? 2. what OS?  The answer you might get could be affected by these pieces of information.  Anyway, what I've observed about Blaster II (in my case, the Chinese-made ones with the Altera name on them): when we initially started using them, we had problems with the USB driver files, device not recognized, etc. I believe we went out onto the Internet and found another set of driver files and these worked. I don't have a URL from where we got these other driver files, but we simply did a Google search to find them. The point is that we had to resort to other means to get a working set of USB drivers.  We're running Blaster II with 3 different versions of Quartus II (v11, v12, full and web versions) on Windows laptops running both XP and Windows 7.  Hope this helps. cheers, jim