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Solved: Access Denied to USB Drive(s)

Discussion in 'Hardware' started by TANN MANN, Feb 16, 2013.

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  1. TANN MANN

    TANN MANN Thread Starter

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    HI all,

    been a very long time since here.

    Have a slight problem.
    Desktop machine running Windows 7 x64 Ultimate, won't access USB drives, they appear in windows explorer and disk management, but I cannot open them, I get the error "g: cannot be opened Access Denied"
    When they do appear, they are 0 of 0 bytes and it shows the file system (FAT32) but thats it.
    I can open them in Safemode
    I can open them on other computers running same OS.
    tried uninstalling AV

    updated all hardware Drivers, MB chipset and BIOS

    Attempted to take ownership, can't so because access is denied, so the usual fix of changing permission to 'Everyone' will not work, as I get the same error.
    I have gone into the group policy setting and checked the deny access to external drives.
    Done the Reg fix of taking ownership, but won't work for a whole drive just a folder.

    One thing I have noticed, with the right click and properties, the computer denying access has the security tab, where as the computer where I can access it doesn't have the security tab option. but again this is just a local group policy option??

    All accounts are administrator.

    I'm kind of at wits end here, I even did a clean install of windows last night to see if that fixed anything, and it worked...until start up this morning where it all just stopped again

    Please Help

    Cheers
    Andrew:confused::confused::confused:
     
  2. airbrushguy

    airbrushguy Banned

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    can you change the file format of the drive/drives to another format ?
     
  3. TANN MANN

    TANN MANN Thread Starter

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    Nope, insufficient privileges access denied error, plus wouldn't this defeat the purpose? I would lose all data through a format.
    At this stage there is only one USB drive that works, and that was the one that was left in the port during the clean install of windows. Have tried both USB3 and USB 2 ports, but nothing.
    Also checked the Autorun.inf on the drive, but it doesn't have one...which is strange.
    Just opened a new drive and it has the same error directly out of the packet
     
  4. TANN MANN

    TANN MANN Thread Starter

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    More updates,

    all drives appear in disk management with their actual drive name (eg one is a macrim imaging drive so its name is MACRIM_PE) With the new drive I was able to formate it through Disk management only, formatted and could successfully open it, plugged a different drive into the the same port, still nothing, put the newly formatted and accessible drive back in, access denied again.

    I tried a virus scan on the drive, it was able to read all files not problem, still cannot open it.

    Its just getting more and more frustrating/confusing
     
  5. airbrushguy

    airbrushguy Banned

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    yes it would defet the purpose i was just curious to see if they became accessble at that point..hmm it is a strange one over my head im afraid without looking right into it like you seem like you have already done
     
  6. airbrushguy

    airbrushguy Banned

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    have you tryed to clear cmos? i usally start with that
     
  7. Simba7

    Simba7

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    ..and what difference would this make when it's the operating system disallowing access to the USB drive?

    Did someone try to use BitLocker on this thumbdrive? Also, is it possible the filesystem was corrupted?

    Also, one alternative is trying to mount the drive under Linux.
     
  8. airbrushguy

    airbrushguy Banned

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    yeah trying under linix is a great idea especially if he dosnt have a computer with linix on it so he can go and build one that would save him alot time money and effort ..or he could just start with the basics as any person would do, stop trolling posts please.
     
  9. airbrushguy

    airbrushguy Banned

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    i can see your very young and thats ok,..he could do all that or he could just start with the basics in case on the off chance its a bios/board issue takes two seconds and gets that out of the way before moving on, but thanks for your input.
     
  10. Simba7

    Simba7

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    *sigh* I'm not even going to bother.

    Anyway, I read further into your post and you say it does run fine on other systems and in safe mode. You also say that the drive is formatted under FAT32, which doesn't have permissions like NTFS.

    I'm leaning towards restrictions on the account, but why would the Administrator account be locked out from reading/writing to a thumbdrive.

    Only thing I can suggest is Malware. If it was a corrupt USB driver, safe mode wouldn't be able to access it either.. but it can. What AV software were you using at the time?

    Also, when you did a clean install, did you wipe the entire drive clean first?
     
  11. dvk01

    dvk01 Moderator Malware Specialist

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    First Name:
    Derek
    what antivirus or other security software do you have installed on that computer?
     
  12. crjdriver

    crjdriver Moderator

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    Your advise is wrong. Clearing cmos is just not going to do anything in regard to the os denying access. Please refrain from giving advise that can potentially cause problems. If you are wondering how it would cause problems, when you reset cmos it defaults the sata controller to whatever mode the board maker deemed appropriate. If you installed windows in a different mode ie ahci, legacy, whatever, it is not going to boot.

    Again stop giving advise that can cause a problem.
     
  13. crjdriver

    crjdriver Moderator

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    For the original poster. If you know how to access the registry, check this key. Sometimes installing software will change the value.
    HKEY_LOCAL_MACHINE folder then SYSTEM >CURRENT CONTROL SET > SERVICES >USBstor

    Find start in the right hand panel and double click on it. Post the dword value here. If it is 4, that is what is blocking the usb.
     
  14. Simba7

    Simba7

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    I am curious on why Windows is blocking the USB port. I've never seen Windows just flat out block a port, unless it was account related or the port itself was damaged.
     
  15. crjdriver

    crjdriver Moderator

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    I doubt it is blocking the port
    It sounds like something is stopping access to the drive. Our systems at work all have this done so no one can plug in a usb drive and infect the network.
     
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