Master Boot Record re-creation

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  1. Posts : 5
    Windows 7 pro 64bit
       #1

    Master Boot Record re-creation


    Hi

    Have a PC with Windows 7 on it. First hard disk with Master Boot Record failed (had an install of windows xp on it) - have now removed faulty disk, but PC will not boot due to Master Boot Record not being on second disk.

    How do I go about re-creating the MBR on this Windows 7 install disk ?

    Tried googling, and as usual nobody seems to have a quick / easy fix - and tried Windows 7 repair options, doesn't work (doesn't even recognise Windows 7 is on the disk).

    So, I have a non-bootable PC... with access to other PC's and laptops around me (also with windows 7 on), so could plug the disk in to one of those via usb dock station etc...

    Hope someone can help.
      My Computer


  2. Posts : 5,056
    Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
       #2
      My Computer


  3. Posts : 15,486
    7 X64
       #3

    You must have a mbr on the second disk already.

    I think you mean win7 boot critical files were on the xp parititon.

    Simplest way to fix that is boot win 7 dvd/repair disc - mark win7 partition active ( use diskpart commands) then run startup repair a couple of times.

    Commands are

    diskpart

    lis vol

    ( find the drive letter win recovery environment has assigned to your win 7 partition - it may not be the same drive letter you used to see in windows - then use that letter instaed of Z below )

    sel vol Z

    act

    exi
      My Computer

  4.    #4

    The repairs didn't work because you didn't mark Win7 partition Active. Use steps above.
      My Computer


  5. Posts : 5
    Windows 7 pro 64bit
    Thread Starter
       #5

    Thanks for help so far. Have tried the instructions as per post by SIW2, which works, but then I get the message that 'Startup repair cannot repair this computer automatically', and when I view details, there is a line which says: Problem signature 07: Missing Boot Manager Now, I boot, and get message 'BootMGR is missing' Press Ctrl-alt-del to restart... What next ?!
      My Computer


  6. Posts : 15,486
    7 X64
       #6

    Did you scroll all the way down - is that the only message that something is missing or may be wrong?

    When you used diskpart - did it say it had successfully marked the volume active?

    You may need to run startup repair usually twice - sometimes 3 times.
      My Computer


  7. Posts : 5
    Windows 7 pro 64bit
    Thread Starter
       #7

    Please see my edit in my last reply 'BootMGR is missing'.... Thanks SIW2 !

    Yes, Diskpart said that is was fine with what it did !
      My Computer


  8. Posts : 5
    Windows 7 pro 64bit
    Thread Starter
       #8

    Okay, all fixed and working again.

    Many thanks for your help :)
      My Computer


  9. Posts : 15,486
    7 X64
       #9

    Great - gald to hear it

    Did you fix it by running startup repair again?

    It has to check what is missing - repair a bit of it - check again, repair another bit - not all in one go I'm afraid.
      My Computer


  10. Posts : 5
    Windows 7 pro 64bit
    Thread Starter
       #10

    Yep, rebooted a couple of times and each time it 'did' something.

    Cool
      My Computer


 
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