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Solutions Arduino UNO/Leonardo on Win7 unknow

By December 21, 2012 10 Comments
arduino_UNO

Hi Guys,  some customers send mail to ask us about the UNO or Leonardo on windows 7 there is “Device not recognized” and “System cannot find specified file.”     We test on some of Windows7 64bit PC and have some of suggestion.  Hope  these are some helpful.

  • At first, Simply updating the driver with “Arduino UNO” on this Unknown Device did not work.The device manager would continue to say no driver was found.I tried these 10 steps and it worked for me. Your mileage may vary.   Please follow this blog  :      http://riverembedded.hackhut.com/2011/12/28/my-arduino-uno-rev-3-and-windows-7-64-bit-installation-unknown-device/

the steps like these :

  1. Update UNO unkonw Driver.
  2. Choose “…List of Drivers”.
  3. Choose “Ports”.
  4. Choose Arduino LLC (I didn’t have that option listed)
  5. However, if you leave the option > Standard Port Types
  6. and select
  7. Have Disc
  8. and point to the recommended Arduino Uno.inf file it works.
If you have solutions , well done !!  Just enjoy your arduino.    But solution didn’t work for me  ?? Don’t worry , there may be losing some of files in your system.
There are three files you may need in your system, you can directly download from here :  usbser.sys  , mdmcpq.inf and mdmcpq.inf_amd64_neutral_fbc4a14a6a13d0c8

 

And then,

  1.  Put the usbser.sys to    C:\Windows\System32\drivers
  2. Put the  mdmcpq.inf  to   C:\Windows\inf
  3. Put the  mdmcpq.inf_amd64_neutral_fbc4a14a6a13d0c8 to  C:\Windows\System32\DriverStore\FileRepository\
Now,  try again the first step.  Hope these are helpful .
Enjoy your arduino !!
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Solutions Arduino UNO/Leonardo on Win7 unknow, 8.6 out of 10 based on 7 ratings
robi

Author robi

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Join the discussion 10 Comments

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  • NAD says:

    THERE IS A MISTAKE IN THIS, STEP4: YOU NEED TO COPY USBSER.SYS TO YOUR ARDUINO FOLDER IN C:WindowsSystem32DriverStoreFileRepositoryarduino uno rev3.inf_x86_neutral_65ebaae8c82d2ccd

    THEN

    UNLOCK IT USING LOCKHUNTER (free to download) to change permissions.

    ONLY THEN WILL IT WORK.
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    FROM LEBANON.

    [Reply]

    Sim Song Zheng Reply:

    unblock what? unblock “arduino uno rev3.inf_x86_neutral_65ebaae8c82d2ccd” or “USBSER.SYS” inside the “arduino uno rev3.inf_x86_neutral_65ebaae8c82d2ccd”? And i can’t find “arduino uno rev3.inf_x86_neutral_65ebaae8c82d2ccd” file in FileRepository, i’m using win8 32-bit.

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