Windows 8 and 8.1 Forums


Windows 8 boots to blank screen. MBR corrupt?

  1. #1


    Posts : 9
    Windows 8.1 64-bit

    Windows 8 boots to blank screen. MBR corrupt?


    After upgrading to Windows 8.1, I started experiencing a weird boot issue. When I boot Windows I only get a black, empty screen. As soon as the BIOS splash disappears the computer stops booting. No disk activity, nothing. My first instinct was to run bootrec /fixmbr and bootrec /fixboot from the Windows 8 install/recovery DVD. This temporarily solves my issue, but the problem returns on next boot. Any idea as to what could be happening here?

    I already had this issue before the 8.1 update, but it only occurred sporadically. I would usually work around this issue by rebooting.

      My System SpecsSystem Spec

  2. #2


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    You get a flashing blinking cursor up in the left corner?

    What you did was correct, but you have to boot from the drive that had the Bootloader for 8 on it, and sometimes that's not the same drive as the System is on. Also, UEFI computers need to be booted from UEFI, it'll show up in the Boot Order in the BIOS.
      My System SpecsSystem Spec

  3. #3


    Posts : 9
    Windows 8.1 64-bit


    Quote Originally Posted by XweAponX View Post
    You get a flashing blinking cursor up in the left corner?
    Yes, for like a split second, but that could be the BIOS.

    Quote Originally Posted by XweAponX View Post
    What you did was correct, but you have to boot from the drive that had the Bootloader for 8 on it, and sometimes that's not the same drive as the System is on.
    I'm not quite sure if I'm understanding you correctly. Are you suggesting that I might have the wrong partition marked as bootable? Here's my disk layout:



    But then why am I able to get it to work sometimes?
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by BenignMustache View Post
    Quote Originally Posted by XweAponX View Post
    You get a flashing blinking cursor up in the left corner?
    Yes, for like a split second, but that could be the BIOS.

    Quote Originally Posted by XweAponX View Post
    What you did was correct, but you have to boot from the drive that had the Bootloader for 8 on it, and sometimes that's not the same drive as the System is on.
    I'm not quite sure if I'm understanding you correctly. Are you suggesting that I might have the wrong partition marked as bootable? Here's my disk layout:



    But then why am I able to get it to work sometimes?
    Your drive could be going bad also try re-seating the cables on the drive.
      My System SpecsSystem Spec

  5. #5


    Posts : 9
    Windows 8.1 64-bit


    Quote Originally Posted by labeeman View Post
    Your drive could be going bad also try re-seating the cables on the drive.
    I did consider that it might be an HDD issue, but a chkdsk scan on the partition where I installed Windows didn't come up with anything suspicious. Any other tests I can run without opening up my laptop?
      My System SpecsSystem Spec

  6. #6


    Manchester, UK
    Posts : 113
    OS X / Windows 8.1 Pro / Ubuntu 13.10


    I would try running the automatic repair function from the Windows repair environment (on the Windows installation disc/usb). It may need running more than once (up to 3 times) with reboots in between.
    Thereby letting Windows repair itself (or find other problems) rather than you running /fixmbr etc.
    It may be happier :-)
      My System SpecsSystem Spec

  7. #7


    Quote Originally Posted by BenignMustache View Post
    Quote Originally Posted by labeeman View Post
    Your drive could be going bad also try re-seating the cables on the drive.
    I did consider that it might be an HDD issue, but a chkdsk scan on the partition where I installed Windows didn't come up with anything suspicious. Any other tests I can run without opening up my laptop?
    CHKDSK just check for file continuity it does not check for surface or misreads on the whole disk, if you have utility to check the SMART on the drive that will tell you if you have any intermittent problems with the drive.
      My System SpecsSystem Spec

  8. #8


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    Your Drive partitioning looks OK, your System partition is on the first available partition, that 100mb partition should be ignored safely. It may have GRUB on it though, sometimes that 100 mb partition is there, sometimes not, it was mostly in Windows 7, so if this was updated from 7, it may be a leftover from that, and you can delete it.

    Go into PC Settings into Advanced Startup, and if you have a Boot to UEFI, do that. When you get int to your UEFI, you can check your boot order, and make sure the boot device is pointed to "UEFI Boot"

    This UEFI stuff changes from system to system, but if it is there, it usually has a UEFI entry in the Boot Order in the BIOS.

    If you don't have it, try deleting that 100mb partition- But that is risky. If you do that, run your Bootrec /fixmbr /Scanos

    You can also do a search for Hiren's Boot CD version 13, it has a Windows XP/7 Bootloader for problems like this, it should get you booted while we are figuring this out. You choose it on the Hiren's disk, and it searches your hard drives for the Windows Bootloader, once it finds it, it boots. They took it out of Hiren's version 15.

    Did you upgrade from 7, or was this 8 originally? If you had 7 on that machine at any time, it explains the 100mb partition. You should be able to safely delete it for 8.
      My System SpecsSystem Spec

  9. #9


    Posts : 1
    WIN 8.1


    I've got exact te same issue.
    Before the update to 8.1 never had any boot issues.
    When i boot with win 8.1 repair (usb stick), i can choose advanced and then to continue to boot win 8.1.
    Then when i reboot it boots fine. When i put the laptop in sleep or shutdown and leave it multiple hours untouched.
    Bang boot problem is back :s very strange.....
      My System SpecsSystem Spec

  10. #10


    Posts : 9
    Windows 8.1 64-bit


    Quote Originally Posted by Duckface View Post
    I would try running the automatic repair function from the Windows repair environment (on the Windows installation disc/usb).
    I've tried that before with no luck. It didn't find or fix any errors. I did use a Windows 8 DVD because I haven't downloaded the 8.1 yet, but I'm planning to do so. The Windows 8 DVD had to skip the startup repair section because I'm using 8.1... darn.

    Code:
    Startup Repair diagnosis and repair log
    ---------------------------
    Number of repair attempts: 1
    
    Session details
    ---------------------------
    System Disk = \Device\Harddisk0
    Windows directory = D:\WINDOWS
    AutoChk Run = 0
    Number of root causes = 1
    
    Test Performed: 
    ---------------------------
    Name: Check for updates
    Result: Completed successfully. Error code =  0x0
    Time taken = 31 ms
    
    Test Performed: 
    ---------------------------
    Name: System disk test
    Result: Completed successfully. Error code =  0x0
    Time taken = 0 ms
    
    Test Performed: 
    ---------------------------
    Name: Disk failure diagnosis
    Result: Completed successfully. Error code =  0x0
    Time taken = 141 ms
    
    Test Performed: 
    ---------------------------
    Name: Disk metadata test
    Result: Completed successfully. Error code =  0x0
    Time taken = 47 ms
    
    Test Performed: 
    ---------------------------
    Name: Target OS test
    Result: Completed successfully. Error code =  0x0
    Time taken = 0 ms
    
    Test Performed: 
    ---------------------------
    Name: Volume content check
    Result: Completed successfully. Error code =  0x0
    Time taken = 1375 ms
    
    Root cause found: 
    ---------------------------
    The operating system version is incompatible with Startup Repair
    
    ---------------------------
    ---------------------------
    I'll get back to you with the results of Windows 8.1's auto-repair feature once I have the DVD.
      My System SpecsSystem Spec

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Windows 8 boots to blank screen. MBR corrupt?
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