Windows 10: No boot black screen, recovery c: access denied Solved

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  1.    22 Oct 2015 #1

    No boot black screen, recovery c: access denied


    Ok I have an HP 2000 Windows 7 to 10 upgrade. Customer stated she had a pop up that indicated she might have a virus then the machine rebooted and will not restart. Scanned with Kaspersky rescue CD and AVG rescue and it came up clean. Ran recovery from a Win 10 usb. No restore points available, Startup repair ends in black screen on boot after bios screen but before sign in. CMD prompt from rescue usb c: cannot be scanned as it states "Access Denied". Ran Hard drive test as well as MRI with no hardware failures. I have google the living crap out of this but I believe there is a permissions Issue on c: drive and I cannot find a way to repair it.
      My ComputerSystem Spec

  2.    22 Oct 2015 #2

    My guess is Ramsome-ware and the drive was encrypted and is locked by password
      My ComputerSystem Spec

  3.    22 Oct 2015 #3

    Kyhi said: View Post
    My guess is Ramsome-ware and the drive was encrypted and is locked by password
    The only issue I have with that is that there is nothing to indicate a way to enter a password. The only partition with an issue is C: drive. I can access all the other drives from x: recovery. Went ahead and booted Linux mint 9 (runs on almost anything) and I am able to browse all partitions on the drive. I cannot see what the permissions are however. Also noted that c: is names Safe Mode? A virus might be at fault though I am sure there is a way to fix it. Can anyone tell me how to change permissions on a partition using the rescue command prompt?


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    Last edited by Mohave PC; 22 Oct 2015 at 14:34. Reason: added content
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  4.    22 Oct 2015 #4

    Is a computer reset an option for you?
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  5.    22 Oct 2015 #5

    DustSailor said: View Post
    Is a computer reset an option for you?
    as a last resort I will be formatting and clean installing Win 10. all other repair and refresh option end with error and I am sure it is because of permissions. I may try booting in Partition Wiz and see if it can tell me anything. Gparted seems to think the partition is ok without errors but cannot report permissions.
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  6. You's Avatar
    Posts : 615
    Windows 10 Enterprise x64 (build 10586)
       22 Oct 2015 #6

    If you can get to command prompt in the USB drive recovery environment, then try typing the following commands and pressing enter:
    bootrec /fixboot
    bootrec /fixmbr
    bootrec /RebuildBcd
      My ComputerSystem Spec

  7.    22 Oct 2015 #7

    How far can you get? does it black screen just before login? [yes] If so, what happens if you leave it for a minute or so? BSOD, anything? I know of a number of computers that have black screens before login, but it is short-lived
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  8.    22 Oct 2015 #8

    You said: View Post
    If you can get to command prompt in the USB drive recovery environment, then try typing the following commands and pressing enter:
    bootrec /fixboot
    bootrec /fixmbr
    bootrec /RebuildBcd
    cannot find os
      My ComputerSystem Spec

  9.    22 Oct 2015 #9

    DustSailor said: View Post
    How far can you get? does it black screen just before login? If so, what happens if you leave it for a minute or so? BSOD, anything?
    left it run for 30 minutes and still no change. No hard drive activity either. The black screen occurs right after the HP logo and before the login prompt.
      My ComputerSystem Spec

  10. You's Avatar
    Posts : 615
    Windows 10 Enterprise x64 (build 10586)
       22 Oct 2015 #10

    By the HP logo, do you mean the BIOS Screen? Or the actual boot screen (with the loading circle underneath it)?
      My ComputerSystem Spec


 
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