How does suspicious Unallocated logical partition shows up suddenly?

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  1. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
       #1

    How does suspicious Unallocated logical partition shows up suddenly?


    How does suspicious Unallocated logical partition shows up suddenly?
    ===========================================

    I have a black screen during start up issue. I posted a thread (long story). I have Lenovo Z580 Laptop. I did not add any hardware or alter HDD configuration after factory install.

    Win 7: Black screen on boot up, before login screen?

    As this community, provided guidance on my thread. I created a Win 7 repair disk using another computer with Win 7, 64 bit.

    With community help. I run the partition Wizard on this Z580 and leaned that a suspicious 201.87 MB Unallocated logical partition shown in Partition Wizard.


    As this unallocated - 200 MB sitting as 5th partition and violates MBR characteristics and cause booting issue.


    How does suspicious Unallocated logical partition shows up suddenly?


    If some "unauthorised" program as well be a game that was tried on this machine
    - tried to create its own partition, failed and left the debries. Naturally it
    should have tried to grab some space from the other legit partitions.
    I have three(3) user logins in this laptop such as Admin, Local user1, Local user 2. The regular use of this computer was with Local User 1 primarily, that does not have admin rights to install/configure disk partition etc .

    This suspicious Unallocated logical partition does shows up in DISKPART thru win 7 repair disk.



    How does an "unauthorised" program/games alter the disk structure without Admin rights?


    Did anyone one in this forum face such issues?


    Thanks for sharing/helping.

    Thanks for directing to Hardware & Devices. I hope someone will look into this issue to help this forum.
    Last edited by MDRI; 17 Aug 2015 at 21:48.
      My Computer


  2. Posts : 205
    Windows 7 Home Premium
       #2

    You can use partition wizard n consume that unallocated space by extending the partition bfore it
      My Computer


  3. Posts : 205
    Windows 7 Home Premium
       #3
      My Computer


  4. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #4

    Thanks for your thoughts. I hope that you reviewed my other detail thread. Here are the recaps.



    Why did this happen?
    • My Laptop is not bootable ( end up with black screen on booting)
    • Unallocated logical partition is not showing up in DISKPART.
    Am I able to use extend option in this situation?

    Have you done this partition extend successfully?

    Does this extend process preserve the existing data in allocated partitions?

    Do I need to take backups? If yes, what are the disks/partitions/folders need back up?

    Thanks for sharing.
      My Computer


  5. Posts : 205
    Windows 7 Home Premium
       #5

    There could b couple of problems 1. Mbr n boot 2. Active partition not set properly
      My Computer


  6. Posts : 205
    Windows 7 Home Premium
       #6
      My Computer


  7. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #7

    Thanks again.

    I did already the suggestion of Bootmgr is missing - Fix . No luck. The problem remains.

    What do you mean by Active partition not set properly?

    I did DISKPART and set Partition 1 as active. Problem did not go away.

    Thanks for helping.
      My Computer


  8. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #8

    Thanks for providing this tutorial.


    Do I need to backup to do this EXTEND?

    Is anyone in this forum could confirm this?

    Thanks for helping.
      My Computer


  9. Posts : 205
    Windows 7 Home Premium
       #9

    After diskpart
    Bootrec /fixmbr
    Bootrec /fixboot
    Bootrec /rebuildbcd
      My Computer


  10. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #10

    I did


    Bootrec /fixmbr
    Bootrec /fixboot
    Bootrec /rebuildbcd

    Issue still remain.
      My Computer


 
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