I've got the DE1 kit and recently upgraded from QII 9.1 to 10.0.Now when I connect the usb cable to the dev kit, activate the programmer from within Quartus, I get "no hardware" status. If I try to add hardware I can only choose between ByteBlaster and Ethernet Blaster... In Device Manager it says the drivers are updated if I try to reinstall them from \quartus\drivers directory. Any ideas?
I would try this:Unplug the USB cable to the DE2. Go to device manager and select View -> Show hidden devices. Then go to Universal Serial Bus controllers. Find the Altera USB-Blaster, right click and uninstall. Then Reboot, connect the USB cable again and power on the DE2, and install from the 10.0/drivers folder. I might also note that 10.1 is now out.