Disable USB Storage Devices Fix it Live!

We just released another Fix it Knowledge Base (KB) article. This Fix it disables USB storage devices as described in KB 823732.

Comments (26)

  1. bmahaf says:

    Hello Larry,

    Thank you for taking the time to post a comment. This Fix it actually disables USB storage devices.

    Are you attempting to block access to your storage device or are you not able to get a storage device to work?



  2. bmahaf says:

    This Microsoft Fix it does not change any permissions on the machine. It only changes the Start value data to 4 as described under the Let me fix it myself section of the Knowledge Base article.

    To set the USBSTOR service back to the default settings you can edit the registry and change the Start value to 3.

    1) Click Start, and then click Run.

    2) In the Open box, type regedit, and then click OK.

    3) Locate and then click the following registry key:


    4) In the details pane, double-click Start.

    5) In the Value data box, type 3, click Hexadecimal (if it is not already selected), and then click OK.

    6) Exit Registry Editor.

  3. Anonymous says:

    FixIt did nothing….


  4. Larry Murphy says:

    After the fix, it still does not recognize Western Digital usb 2 storage notebook. I asks for software that should not be required

  5. dodo says:

    how to uninstall this software system to enable

    usb ports again?

  6. jameslevinworth says:

    I’m confused.  The knowledge base article, "How can I prevent users from connecting to a USB storage device?" located at http://support.microsoft.com/kb/823732 lists resolutions for both:

    If a USB storage device is not already installed on the computer


    If a USB storage device is already installed on the computer

    This fix it tool is listed to rectify "if a USB storage device is already installed".

    What is not clear to me if the fix it tool resolves if a "device is *not* already installed" and prevents those as well.  The title of this tool "Disable USB storage devices" leads you to believe it does, but by what means?

    Does the tool change the permissions for Usbstor.pnf and Usbstor.inf as described for the "not already installed" solution?  I found that to not be the case on my system after running the tool.

    It would be very helpful if after accepting the license agreement for the tool to actually be given a description of what the tool is about to do and give the user the opportunity to continue or cancel.  As it is now, it just runs with no further warning or info.

    It would also be very helpful to be able to undo this action.  There are no information or means to reverse this action provided.  I was hoping this blog would include this information, but it does not.

  7. German Ruiz de Castilla; pity1939@sbcglobal.net says:

    I have problem with PROBLEM REPORTS AND SOLUTIONS:


    Windows encountered a problem while installing device drivers for your Intel(R) 82801GB USB2 Enhanced Host Controller – 27CC

    Problem signature

    Problem Event Name: PnPDriverInstallError

    Architecture: x86

    Win32 error: 000005B4

    Inf name: usbport.inf

    Driver Package hash: 37aeef478b95961fb0342728acd556517a0f635e

    DDInstall section name: EHCI.Dev

    OS Version: 6.0.6000.

    Locale ID: 1033

    Extra information about the problem

    Bucket ID: 83815971


  8. Nitin says:

    We have blocked the USB access to the limited user in domain using group policy & batch file . This policy is working fine with USB drives which are alreay used but whenever user not having USB access connect a new USB drive it detects the USB drive automativally & user get the access & after restarting the system the access get blocked.

    So How can be blocked detection of new USB drive for the USB disabled users in domain ?

  9. pepi says:

    OK…now that I have disabled it, hiw do I enable it again? seems several folks are having the same probs.

  10. jürgen says:

    For those who has applied the fix and want to enable again the usb, only uninstall the usb drivers in Hardware Manager and reboot the system. Usb appears again. (Sorry my english)

  11. jone says:

    Hi bmahaf / bmahaf,

    thanks for utility, it is working 50% only.

    It disable USB stick only, other USB card are still available, and showing USB mass storage.

    Please release new version

  12. hi herry cruiz says:

    hi i wanna make such a software that can stop

    the access of the USB drive .

  13. hi herry cruiz says:

    i wanna make such a software  that can stop

    usb ports

  14. thobs says:

    OK…now that I have disabled it, hiw do I enable it again? seems several folks are having the same probs.

    any answer to this particular concern?

  15. Vince says:

    To lock down USB ports for mass storage devices:

    •         Sign on as administrator

    •         Open Windows Explorer & show hidden files & extensions for know file types (tools, folder options, view tab)

    •         Open the properties for C:WindowsInfUsbstor.inf & C:WindowsInfUsbstor.pnf

    •         On the security tab, deny all options for all users, including SYSTEM & Administrators

    •         Hide hidden files & hide extensions for known file types again

    •         Run Regedit & change the value data box to 3 for the following:

  16. Peggy says:

    Someone is installing a keylogger on my computer, can these instructions stop it from working?

    I also don’t want anyone to be able to use my dvd/cd recorders (or whatever they are called) to copy anything from my computer.

    What do i do?

    Thank you very much.


  17. Peggy says:

    I also have a floppy disc drive and three more for camera disks.  I have three hard drives, the regular one and two backup or slave drives.

    Thanks again.    Peggy

  18. dodo says:

    This software is bad. I need enable the usb ports but is not recognize. I Uninstall de drivers and reboot but is not reconfiguring again.

  19. Chirag Kadia says:

    How to uninstall this software?…

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  22. John says:

    Disable USB Storage Devices Fix it Live! article is a big knowledge source.

  23. WhyDontWeRed says:

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  24. vIRGINIA SCOTT says:

    Had a power failure, now the Kalliba USB device does not regist on PC   Windows XP.

  25. dave butler says:

    my device manager says that i have anknown devise in the usb catagory says the device has stopped working  a code 43 i cant for the life of me figure out what is is or how to fiw iot would love the help

  26. david butler says:

    it says its an unknown devise also im running a hp with windows 7 ultimate sorry for the double blog its my first time doing this

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