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Windows 10 Unmountable Boot Volume Error Message And Automatic Repair

Anonymous
2017-07-27T11:10:17+00:00

Hi, I seem to be having an issue during start-up.

First: My Desktop PC was powered off for about 16 hours, and when I 

had shut it down, it shut down normally at that time.

Second: When I turned on my PC, the Windows 10 logo screen appeared

as it would normally do, but the circle of dots remained on for an

extended period of time, and then a blue screen appeared saying

that "Your PC ran into a problem, and needs to restart". At the bottom

of that screen a stop code had said "UNMOUNTABLE BOOT VOLUME".

Then the PC rebooted with the Windows 10 logo screen and the

circle of dots with a message saying "Preparing Automatic Repair".

Third: After that screen disappeared, what looked like a Command

Prompt window briefly flashed onto the screen, and then I had seen

nothing but a black screen.

What I would like to know is 1). In general how long should the

Automatic Repair mode be running, And 2). What is causing the

Unmountable Boot Volume. 

It has been suggested by reading some of the posts within

the community, that my HD may be at fault, is this true?

For point of reference, I have a HP All In One Desktop PC

that was purchased in early 2011 with Win 7 installed.

And except for an issue with the optical disc drive

(CD-R, CD-RW, DVD, Blu-Ray) that occurred in late 2015,

the PC has been functioning normally.

And also for point of reference.

Just before the expiration date for the free upgrade to

Win 10, I had installed Win 10 on my PC, and it has also

been functioning normally, as also with the recent

Win 10 Creators Update that was installed in Mid-June of

this year.

If anyone within the community can tell me what is going

wrong with my PC, it would be very helpful, and greatly

appreciated.

Thanks in advance.

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2017-07-30T10:37:05+00:00

    Hello Smiley,

    The "Unmountable Boot Volume" error message occurs due to a variety of reasons. It can be due to a damaged file system and cannot be mounted, or the basic input/output system (BIOS) settings are configured to force the faster UDMA modes. It can also occur if there is a problem in the system hard drive or in the partition where your Windows is installed. It doesn't necessarily mean that your hard disk is defective.

    The Automatic Repair should only take you for about 15 minutes max.

    Since you've mentioned that you can't reach your lock screen to be able to log in and proceed to troubleshoot your PC, let's create an installation media and perform some troubleshooting steps using that tool.

    You can download the installation media tool from this link. Don't worry as the steps on how to download it can be found on the link.

    After successfully downloading it, you can proceed to these troubleshooting methods. Make sure that you start your PC using the installation media.

    Method 1 - Perform a Chkdsk.

    1. Select the Repair your computer option found at the lower-left corner once you start your PC using the installation media.
    2. Choose Command Prompt.
    3. Type chkdsk /r c:, then press the Enter key from the keyboard. Note: Replace c: to the bootable drive letter you're using if it's other than c:.
    4. Select Y for Yes if you were asked regarding checking the disk the next time the system restarts.
    5. Reboot your PC. Let's keep our patience here as the chkdsk can take quiet some time.

    Method 2 - Repair Master Boot Record.

    1. Select the Repair your computer option found at the lower-left corner once you start your PC using the installation media.
    2. Choose Command Prompt.
    3. Type bootrec /fixboot, then press the Enter key from the keyboard.
    4. Reboot your PC. Your patience is also needed here.

    Method 3 - Automatic Repair

    1. Select the Repair your computer option found at the lower-left corner once you start your PC using the installation media.
    2. Choose Troubleshoot, then Advanced options.
    3. Select Automatic repair, then Next.

    If these methods didn't work to repair your PC, then you seem to have a bad hard drive that might need a replacement. That being said, you can check it with your manufacturer if you reach this point.

    We'll be waiting for your update.

    Best.

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  1. Anonymous
    2017-08-05T14:25:13+00:00

    Hello Again Leviozar & Michelle. Update: After the last post here,

    I did some troubleshooting of my own. And now at the present

    time, my Desktop PC seems to now be working like it should.

    I cannot say what exactly what the problem was, but I

    suspect that there might be some sort of an unknown

    issue or error with my HD, which has seemed to resolve itself.

    However, whatever the issue was somehow also

    affected my Anti-Virus software (Norton). I

    cannot say for sure if there was any kind of

    security threat on my Desktop PC or not

    that was the possible reason for the Start-Up

    & HD issues, but I was forced to uninstall &

    then reinstall Norton software because I

    couldn't launch it at all even though other

    programs such as the MS Edge Browser &

    AOL Desktop for example functioned normally

    once the HD returned to normal function.

    After uninstalling & reinstalling Norton &

    running a quick scan on my Desktop PC to

    see if the software was functioning normally

    & to check for any possible security threats,

    the software worked like it should, and the 

    quick scan came up clear of any security 

    threats.

    So "Fingers Crossed", I hope this will be the

    end of all my problems that I have been thru

    for over a week now, & I hope this will never

    happen again.

    Finally, I would like to say Thank You for all

    your help, assistance, & suggestions for 

    resolving this problem.

    Wishing You All The Best

    -Smiley.

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  2. Anonymous
    2017-07-28T10:30:15+00:00

    Hi, Leviozar; Thanks for responding to my problem.

    Some additional info. for you.

    The screen stayed black for about 1 Hour and 50 Minutes, then the Win 10 

    logo and the circle of dots suddenly appeared with a message that said

    something about diagnosing the PC, and then after about an Hour, the

    message changed to "Checking For Disc Errors-This Should Take An Hour Or 

    More" That message stayed on for a while, and then the screen once again

    went all black.

    Then after some time, it seemed that the PC rebooted itself, and the

    original problem with the blue screen that I mentioned earlier reappeared,

    and the above process started over again as stated above.

    I had the PC running for about 8 Hours, and as far as I know, the same

    thing repeated at least 3 or more times during that period of time. 

    After that, I finally gave up and pressed and held the power button

    to force the PC to shut down.

    Also in regards to the Advanced Boot Options that you mentioned above,

    is that accessed when the HP screen appears, and tapping the "F-10" key

    to go into the boot menu, or is there another process to access that feature?

    When I have this issue, I can't even get into the "Sign-In" screen to enter my

    password, so if that is the only way to access the Advanced Boot Options,

    what do I do next to possibly resolve this?

    Please let me know, and once again, Thanks.

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  3. Anonymous
    2017-08-01T12:50:17+00:00

    Hi, Michelle;

    First please disregard the question that I previously posted. I thought that

    I had an 8GB USB flash drive. But that doesn't seem to be the case.

    The only flash drive that I had was a 4GB one, but that had already

    has material on it that I still wanted, so that wasn't an option.

    So I went and bought a new one which is a 16GB flash drive which

    obviously had more than enough room on it to support the download.

    The files successfully downloaded after about 2 Hours and 45 Minutes,

    only because my internet speed is not very fast, and then the

    files transferred to the flash drive after that.

    Then following the instructions provided on the web link, inserted

    the flash drive into the USB port on the affected PC. In order to 

    access the boot menu on my PC, I had to tap the Esc key on the

    keyboard when the HP start screen popped up. Then selected the

    flash drive from the list to launch the program.

    I first did a Chkdsk shown in Method 1, and it didn't run very long

    maybe about 10 Seconds, and from what I can understand from

    the results shown, it appears to me that it didn't find any problems.

    It also didn't ask regarding checking the disk the next time the

    system restarts, so I went on to Method 2: Repair Master Boot Record.

    After following the instructions shown and doing a reboot, nothing

    seemed to happen except it went back to the blue screen that I 

    previously mentioned, and doing an Automatic Repair cycle afterwards.

    Failing that, I went on to Method 3: Automatic Repair. 

    Following the provided instructions shown, I ran an

    Automatic Repair cycle which didn't run very long

    less than 5 Minutes.

    After this completed and the PC rebooted, it took a few minutes

    and I was finally able to reach the lock screen. However, after I entered

    my password and the desktop came up, I found that things went very

    slowly, and the green indicator light on the side of the PC that lights up

    when the HD is running was mostly a still green with little or no blinking.

    When I try to open a file or try to launch a program, most files take some

    time to open, and most programs will not launch at all. 

    So that's it. Now after going thru this entire process, is the problem

    being caused by my HD, or could it possibly be one of the

    installed programs at fault, and if it is the latter how do I find out

    which one?

    Also could it be that Windows needs to be re-installed?

    Please let me know, and once again Thanks.

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  4. Anonymous
    2017-07-27T17:27:41+00:00

    Hi Smiley,

    We're yet to identify if the hard drive is at fault. We can isolate it while doing several troubleshooting methods.

    If you get a message that Startup repair couldn't repair PC, access/click the Advance Boot Options.

    • Click Troubleshoot
    • Advance Option
    • Command Prompt, then enter the following commands:

    bootrec /fixMBR

    boot /fixBoot

    boot /rebuildBCD

    • Restart the PC.

    Once you are able to boot up to your Desktop, run the chkdsk /r in cmd and monitor the performance.

    We will wait for your response.

    Regards.

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