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Windows 7: How does suspicious Unallocated logical partition shows up suddenly?

17 Aug 2015   #1
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 
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?


Quote:
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.


My System SpecsSystem Spec
.
18 Aug 2015   #2
nooruddin76

Windows 7 Home Premium
 
 

You can use partition wizard n consume that unallocated space by extending the partition bfore it
My System SpecsSystem Spec
18 Aug 2015   #3
nooruddin76

Windows 7 Home Premium
 
 

My System SpecsSystem Spec
.

18 Aug 2015   #4
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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 System SpecsSystem Spec
18 Aug 2015   #5
nooruddin76

Windows 7 Home Premium
 
 

There could b couple of problems 1. Mbr n boot 2. Active partition not set properly
My System SpecsSystem Spec
18 Aug 2015   #6
nooruddin76

Windows 7 Home Premium
 
 

My System SpecsSystem Spec
18 Aug 2015   #7
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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 System SpecsSystem Spec
18 Aug 2015   #8
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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 System SpecsSystem Spec
18 Aug 2015   #9
nooruddin76

Windows 7 Home Premium
 
 

After diskpart
Bootrec /fixmbr
Bootrec /fixboot
Bootrec /rebuildbcd
My System SpecsSystem Spec
18 Aug 2015   #10
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

I did


Bootrec /fixmbr
Bootrec /fixboot
Bootrec /rebuildbcd

Issue still remain.
My System SpecsSystem Spec
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 How does suspicious Unallocated logical partition shows up suddenly?




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