Windows 10: "inaccessible_boot_device" - PC Won't Boot at All - Black Screen Solved

Page 1 of 4 123 ... LastLast
  1.    10 Sep 2015 #1

    "inaccessible_boot_device" - PC Won't Boot at All - Black Screen


    CPU/GPU: AMD A10-7850K
    MOBO: MSI A78M-E35
    SSD: SanDisk Plus 120GB
    RAM: EVGA 8GB 2133MHz
    PSU: EVGA 80+ 430W
    Monitor: Acer G237HL bi

    I installed Windows 7 Home Basic and did all Windows updates; this went fine. Reserved Windows 10 and downloaded/installed it when it was ready; this went fine. Once in Windows 10, tried to "reset this pc" by choosing "remove everything" and "just remove my files"; this went fine until doing a restart after reaching 100%.
    This issue being the "inaccessible_boot_device" error that many others have gotten which causes the PC to enter a restart loop.

    Well, during this loop I made the (apparent) mistake of turning off my PC. Now, I can't even boot my PC at all. I get a black screen. I can't use the Windows 7 disc, can't use my MOBO disc, can't even boot into bios... nothing. All I see when I turn on my PC is literally a black screen with nothing on it.

    What can be done to fix this? I've read that putting Windows 10 on a USB by using the Microsoft media creation tool and booting from that to clean install works, but if I can't even boot from the Windows 7 disc, how can I boot from a USB? And I can't even enter BIOS to force a USB boot.

    PLEASE HELP ME.


    UPDATE: Okay, my PC will now boot into the "inaccessible_boot_device" error blue screen and does the restart loop. Not sure what I should do now. I'm afraid to power off my PC again.

    UPDATE #2: Not sure why, but I was finally able to boot into BIOS. My only guess would be that, maybe when I tried(but failed) to remove my MOBO battery, just from me wiggling it caused it to reset? Idk.

    Anyway, once in BIOS, I changed boot priority to DVD and was able to access reinstalling Windows 7.

    I am right now reinstalling Windows 7, on Disk 0 Partition 2(if that matters. wouldn't even allow me to install on partition 1 or 3).

    So, from the looks of things, everything is back to normal? I should be able to finish reinstalling Windows 7, do the updates and redownload/reinstall Windows 10 without issue? Though, this time I will NOT attempt to "reset this pc".

    UPDATE #3: I'm back into Windows 10. Wooo! So, I'm still not sure why I was finally able to boot into BIOS, but once I was able to, I changed DVD boot drive to top priority and was able to reinstall Windows 7 from the disc. I then did all Windows Updates. I then downloaded the Windows 10 ISO and mounted/installed it with Virtual Clone Drive. I am now back inside Windows 10, hoping nothing else goes wrong.
    Last edited by PLEASE HELP ME; 10 Sep 2015 at 15:44.
      My ComputerSystem Spec


  2. Posts : 11,235
    W10Prox64
       10 Sep 2015 #2

    Hi PLEASE HELP ME and welcome to TenForums.
    Sorry to hear about the problems you're having.

    Now, are you able to get into the advanced start menu and try a reset?

    If not, please try downloading an ISO, burn to disk or USB, and follow instructions here. Skip when it asks for a key.

    Telling the computer to boot from disk or USB is done in the BIOS (usually by pressing the F11 or F2 key), so you'll have to do that first.
      My ComputerSystem Spec


  3. Posts : 11,235
    W10Prox64
       10 Sep 2015 #3

    Sorry about that - you were updating your post as I was responding....

    PLEASE HELP ME said: View Post
    CPU/GPU: AMD A10-7850K
    MOBO: MSI A78M-E35
    SSD: SanDisk Plus 120GB
    RAM: EVGA 8GB 2133MHz
    PSU: EVGA 80+ 430W
    Monitor: Acer G237HL bi

    UPDATE: Okay, my PC will now boot into the "inaccessible_boot_device" error blue screen and does the restart loop. Not sure what I should do now. I'm afraid to power off my PC again.

    UPDATE #2: Not sure why, but I was finally able to boot into BIOS. My only guess would be that, maybe when I tried(but failed) to remove my MOBO battery, just from me wiggling it caused it to reset? Idk.

    Anyway, once in BIOS, I changed boot priority to DVD and was able to access reinstalling Windows 7.


    Oh good.

    PLEASE HELP ME said: View Post
    I am right now reinstalling Windows 7, on Disk 0 Partition 2(if that matters. wouldn't even allow me to install on partition 1 or 3).
    That sounds correct. Please post a screenshot of your disk setup in Computer Management>Disk Management so we can verify.

    PLEASE HELP ME said: View Post
    So, from the looks of things, everything is back to normal? I should be able to finish reinstalling Windows 7, do the updates and redownload/reinstall Windows 10 without issue? Though, this time I will NOT attempt to "reset this pc".


    Yes. There is some prep work you might want to review before trying again:

    If you have any 3rd-party antivirus, uninstall it.
    If you have any 3rd-party firewall, uninstall it.
    If you have any hard drive monitoring program, uninstall it. (Speccy)
    If you have any overclocking setup, go back to normal.
    Disconnect any external devices.
    Uninstall any theme modifications.
    If you have Google Chrome x64 browser, uninstall it. (Use 32-bit or their Canary version after upgrading.)
    If you've moved your User Libraries to a custom location, move them back to default.
    Check for updated drivers for your hardware (especially video) from your manufacturer's website. (This is important, as upgrade failures early on usually indicate driver problems.)
    Check for BIOS updates from your manufacturer's web site.
    Run sfc /scannow from an administrator command prompt.
    Run chkdsk as well.
    Run Malwarebytes AntiMalware (free) to be sure the system is virus-free. (of course, you have a clean install so this is not necessary.)

    Be sure you have a backup of your system, or at least your files. I recommend Macrium Reflect Free for a disk image and rescue media before upgrading. You could then just copy/paste your files to an external drive.

    If all this checks out, and you're ready to try the upgrade again:

    Go to the Media Creation Tool site
    Select the correct architecture for your machine (32 or 64 bit)
    Select the option to make an ISO for upgrading
    Extract the files from the ISO and select upgrade, keeping apps and files (begin at step 5)

    Once the system is upgraded, disable Fast Startup and give it a few shutdowns/startups. If everything is working well, you can try enabling Fast Startup then. Then, be sure to turn on System Restore and create a restore point or two.

    Let us know how it goes.
      My ComputerSystem Spec

  4.    10 Sep 2015 #4

    simrick said: View Post
    That sounds correct. Please post a screenshot of your disk setup in Computer Management>Disk Management so we can verify.
    Imgur link: https://i.imgur.com/uGGzwBI.png (Sorry for the resolution. Clean install defaults to 800x600 for some reason.)


    As for the other stuff you said, well, I don't have anything third party installed except for Firefox Portable. Don't plan to install anything else until I get into Windows 10. I shouldn't have any overclocking unless it was automatically done by the MOBO or something. Don't have anything external connected, unless you count mouse, keyboard, monitor or speakers. Haven't moved user libraries. I was planning on waiting to upgrade drivers once I got into Windows 10.

    Wait... could that be why it failed.... because I didn't update drivers first? Although, many other people are having this issue, too, and I imagine at least some of them did indeed have drivers updated.

    Basically, I'm planning on doing what I did before: do all Windows Updates on Windows 7, install nothing manually except for Firefox Portable(to use while waiting for W10), reserve Windows 10 once it shows up, then simply wait for it to be ready and download/install it. However, this time I won't even attempt to "reset this pc" again. Once in Windows 10, that's when I'm planning on making sure everything is up-to-date, etc..

    Does the above paragraph sound okay? And, as far as the "reset this pc" option, I imagine this is some sorta bug and will just have to wait for Microsoft to fix it before attempting again?
      My ComputerSystem Spec


  5. Posts : 11,235
    W10Prox64
       10 Sep 2015 #5

    I'd like your pic actually posted in the thread - here it is: (have to go to advanced options to do it)


    Click image for larger version. 

Name:	pleasehelpme-diskmgnt.PNG 
Views:	6 
Size:	134.1 KB 
ID:	36755

    Something is not right. Your first partition should not have a drive letter. That is where the boot manager & boot configuration files reside. It will also contain Bitlocker startup files if you use that. To understand it better, you can read this.

    I think you will want to remove the drive letter from the first partition (E:\).

    If you already had W10 on here, and activated, you can just go ahead and clean install W10, using an ISO disk. Choose SKIP when it asks for a key. If you don't get the option to skip, you have download the incorrect ISO file.

    I would format the drive and remove all partitions, then clean install. You said you have changed the boot order to make DVD first. If you are not sure if the OS was activated, then do an upgrade (don't wipe the disk).

    Download the ISO from MS TechBench.

    Failures due to drivers usually occur during the first reboot during installation. But, you said you already had W10 installed at one point, then tried to do a reset.

    Edit: One more thing: after W10 is installed, turn off fast startup and give it a few shutdowns/start ups to be sure everything is working properly. Run sfc /scannow to verify integrity of system files.
    Last edited by simrick; 10 Sep 2015 at 10:03. Reason: added fast startup info
      My ComputerSystem Spec


  6. Posts : 11,235
    W10Prox64
       10 Sep 2015 #6

    Change, add or remove a drive letter in Windows 7:

    http://windows.microsoft.com/en-us/w...#1TC=windows-7
      My ComputerSystem Spec

  7.    10 Sep 2015 #7

    simrick said: View Post
    Change, add or remove a drive letter in Windows 7:

    http://windows.microsoft.com/en-us/w...#1TC=windows-7
    Would it be a terrible idea to just wait until I'm back in Windows 10 and then delete the partitions/drives I shouldn't have? Because I'm pretty frustrated at this point from dealing with all this and the last thing I wanna deal with is yet another reinstall if I don't have to.
      My ComputerSystem Spec


  8. Posts : 11,235
    W10Prox64
       10 Sep 2015 #8

    PLEASE HELP ME said: View Post
    Would it be a terrible idea to just wait until I'm back in Windows 10 and then delete the partitions/drives I shouldn't have? Because I'm pretty frustrated at this point from dealing with all this and the last thing I wanna deal with is yet another reinstall if I don't have to.
    Um, I don't want you to delete the partition, just the drive letter. It should not have a drive letter assigned and it shouldn't show up in "Computer".

    Your Drive 0 is your whole entire internal hard drive, which is currently divided into 3 partitions. The first partition is where the boot info resides, the second partition is your C:\ drive where your OS resides, and your third partition is your recovery partition. In Disk Management, you can see it's all Drive 0, with three sections on it. In "Computer" using Explorer, only C:\ should be showing. Right now, I'll bet if you open Explorer and go to Computer, you will see drive C and drive E. So, E should not be showing - it's only showing because there's a drive letter attached to it.

    So, something is not right, and I suspect you will have upgrade problems because of it.

    Do you know how that E drive letter got assigned? You didn't do it on purpose did you?

    The thing is, since you were already in W10 once, (by upgrading-I assume), and if the W10 OS was "activated", then you can go straight to a clean install of W10, and not deal with W7 at all. Because, once a qualifying OS has been upgraded and activated, you can clean install W10 as often as you like/need.

    The reason I am leaning to a clean install (assuming your OS was indeed activated when first upgraded), is because it will avoid these inaccessible boot device errors you're seeing, which I believe may have something to do with your boot partition, which should not have a drive letter mapped to it.
      My ComputerSystem Spec


  9. Posts : 2,020
    MS Windows 10 Pro - Perm Activation of 10585
       10 Sep 2015 #9

    simrick said: View Post
    Um, I don't want you to delete the partition, just the drive letter. It should not have a drive letter assigned and it shouldn't show up in "Computer".

    Your Drive 0 is your whole entire internal hard drive, which is currently divided into 3 partitions. The first partition is where the boot info resides, the second partition is your C:\ drive where your OS resides, and your third partition is your recovery partition. In Disk Management, you can see it's all Drive 0, with three sections on it. In "Computer" using Explorer, only C:\ should be showing. Right now, I'll bet if you open Explorer and go to Computer, you will see drive C and drive E. So, E should not be showing - it's only showing because there's a drive letter attached to it.

    So, something is not right, and I suspect you will have upgrade problems because of it.

    Do you know how that E drive letter got assigned? You didn't do it on purpose did you?

    The thing is, since you were already in W10 once, (by upgrading-I assume), and if the W10 OS was "activated", then you can go straight to a clean install of W10, and not deal with W7 at all. Because, once a qualifying OS has been upgraded and activated, you can clean install W10 as often as you like/need.

    The reason I am leaning to a clean install (assuming your OS was indeed activated when first upgraded), is because it will avoid these inaccessible boot device errors you're seeing, which I believe may have something to do with your boot partition, which should not have a drive letter mapped to it.
    PARTITION Info - save this for me.
      My ComputerSystem Spec


  10. Posts : 11,235
    W10Prox64
       10 Sep 2015 #10

    acmanten said: View Post
    PARTITION Info - save this for me.
      My ComputerSystem Spec


 
Page 1 of 4 123 ... LastLast

Related Threads
I recently upgraded to Windows 10. Yesterday I experienced a red boot screen after restoring to a windwos restore point installing a new GeForce driver, that is probably related to this issue. That only happened once. I reinstalled my GPU drivers...
Hi, First to know exactly what the problem that I walk about visit this link here Finaly I found the solution for this problem, the problem happen becouse of wifi ( internet ), yes that true. All you need to do is to trun wifi off and the...
Downloaded windows 10 from 7 Pro and all seemed fine until first boot and the initial part of the desktop (background only) is just sat there blinking on and off. after an hour an error panel shows with following script "Windows socket error: Only...
I have a problem, I tried to update from win 8.1 to win 10 and it failed . black screen in 75% during installation " in configuring setting". I shutdown laptop and it go back to win 8.1. ...
Hi, when restarting my laptop after a windows 10 update yesterday, got an " unmountable boot volume" message on start up with windows trying to repair but then goes to a black screen with nothing but a white cursor. only displaying black screen....
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 22:54.
Find Us