USB Blaster stopped working with Quartus 10.1

[Altera_Forum]

Hello 

 I've got a problem with Quartus 10.1 and USB Blaster. When i first installed and run Quartus everything worked OK, but when i rebooted computer and tried to make second project Quartus stopped working with blaster. When i press start in "Programmer" LED in Blaster blink and Quartus says "Programmer operation was NOT succesful". In "Hardware setup" i can see my USB Blaster in USB 0. In "JTAG Chain debugger" in JTAG Chain Integrity" when i run test i got message "JTAG chain problem tedected" and "No device detected" and in "JTAG Chain Debugging" i got "Incorrect clock value".   I've got windows 7 64bit  I installed drivers from Quartus 10.1

[Altera_Forum]

Same to me to use 10.1sp driver from Quartus II. I got the driver from this and it works. 

 http://www.alteraforum.com/forum/showthread.php?t=19233&highlight=win7x64+usb+blaster

[Altera_Forum]

it could be your blaster cable

[Altera_Forum]

Hello 

I have tried update drivers, but windows says it's up-to-date. I have tried on 2 different blaster programmers.

[Altera_Forum]

1. Remove all the USB devices connect to your pc. 

2. Force uninstall driver on your current system. 3. Plug in USB Blaster and point to directory driver above link and click Install Drive Anyway.   Sean