Fixing BLBDrive Unknown Device in 6801

If you’re like many others, then upon installation of Windows 7 build 6801 you have an unknown device in the device manager that doesn’t seem to fit with any of your hardware.  And if you look at the hardware ID it is shown as DETECTED\blbdrive.  Up until now we thought this was something to do with backup, but we now know it is for the “File as Volume” driver.  Which probably has something to do with the VHD mounting technologies in Windows 7.  The following guide will show you how to fix the unknown device in the device manager.

  1. Navigate to %windir%\system32\drivers
  2. rename blbdrive.sys to blbdriveold.sys or something similar
  3. Go into the device manager and right click the unknown device and click “Update Driver”.
  4. You want to find the driver on your own, so select the bottom option.
  5. At the screen, select the option shown in the screenshot:
    Step1
  6. Next, click the have disk option, and navigate to C:\Windows\System32\DriverStore\FileRepository\blbdrive.inf_amd64_neutral_f7447a670ab06496 (for x64, x86 name should be similar).  Select the File as Volume driver and click next.
  7. You will be presented with a prompt warning that the device may not be compatible.  Ignore the warning and click yes.
  8. The device will install.  The system tray may report that installation failed, but that is not the case.  Reboot when asked and enjoy a clean device manager!

Posted by: Chris123NT

Published on: November 24th, 2008 at 12:31 AM

Posted in Tips and Tricks,Windows 7

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6 Responses to 'Fixing BLBDrive Unknown Device in 6801'

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  1. November 24, 2008 at 9:09 pm

    Mark:

    Error: Windows was unable to install your Unknown Device Windows could not find driver software for your device.

    Windows 7 Build 6801 x64

  2. November 24, 2008 at 9:26 pm

    Chris123NT:

    You clicked the wrong option on the first screen in the update driver wizard ;)

  3. November 25, 2008 at 6:51 pm

    Will:

    Nice find, worked fine for me on x86.

  4. December 2, 2008 at 3:56 am

    Cristina Chiricuta:

    Thank you Chris. I did the same mistake as Mark the first time,but then realized it and did as you said and it worked and now i have a nice clean device manager in Windows 7 built 6801 64bit.
    Can you help me some more and tell me what antivirus soft works well with this.I had NIS2009 and it blocked. Now I’m using Avast Pro.
    Sometimes I get blue screens when i’m watching movies in extended desktop with the HDMI cable.Maybe is an ATI problem since I have ATI Mobility Radeon 3430 prerelease WDDM 1.1 driver.
    Any way thanks.Great find!

  5. December 2, 2008 at 7:42 pm

    l33txp:

    Christina, I’ve been using AVG Anti Virus… it has a good reputation and zero issues with Windows 7 6801 x64

  6. December 3, 2008 at 6:48 am

    Cristina Chiricuta:

    Thanks. I have AVG and I’ll install it now.

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