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Operating system Not found in windows 7


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#1 pavithrakb

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Posted 23 December 2013 - 07:35 AM

Hi...
My 1TB WD passport harddrive had a problem "format disk drive" .
I had very valuable data in the drive and wanna fix it.
I followed the post in the forum (http://en.kioskea.net/forum/affich-68012-external-hd-wants-to-format-can-t-access#15)  and tried with Partition Table Doctor software.
It didn't detect my external hard drive and displayed my laptop harddrive (harddrive 1) has some sector to fix and I fixed it. it saved and asked for reboot.
My after rebooting Im getting "Operating system Not found" :(
Now I'm afraid that both my HDD and laptop hard drive are corrupted.
please someone help me in fixing this problem.
Atleast my laptop...... :(
Its really urgent...



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#2 Anshad Edavana

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Posted 23 December 2013 - 08:24 AM

Hi

 

Do you have Windows 7 install CD or System repair CD in hand ?. If yes, boot from it and run the automatic startup repair.

 

http://www.youtube.com/watch?v=RaFeELqEJ1Y

 

If you don't have an install disc, create a System Repair CD from a friend's machine and use that.

 

http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html



#3 pavithrakb

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Posted 23 December 2013 - 07:37 PM

I don't have the Install CD in hand.

I wiill try the second option you gave...

Thanks Anshad Edavana :)


Edited by pavithrakb, 23 December 2013 - 07:44 PM.


#4 pavithrakb

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Posted 24 December 2013 - 01:45 AM

Hi.. I tried the second option,,,

I created a repair CD from my friends system and tried to fix my system..

I choose the repair option, after scanning for a long time. it said if it has repaired sucessfully thw windows will load..

But after restart it again goes into windows repair disc. I cancelled and removed the CD to check.

Again the same error Operating Sytem not found.

 

P.S

After repair, i open the "repair details" and find all the test are completed sucessfully. The satrtup repair details are givenn below.

 

Session details

--------------------

System Disk=/Device/Harddisk0

windows directory=

Autochk Run =0

number if root causes = 1

 

Test performed:

--------------------

name:Check for updates

result: completed sucessfully. Error code =0x0

time taken = 15ms

 

Test performed:

--------------------

name: System disk test

result: completed sucessfully. Error code =0x0

time taken = 16ms

 

Test performed:

--------------------

name:Disk failure diagnosis

result: completed sucessfully. Error code =0x0

time taken = 483ms

 

Test performed:

--------------------

name:Disk metadata test

result: completed sucessfully. Error code =0x0

time taken = 0ms

 

Root cause found :

The partition table does not have a valid system partition.

 

Repair action: Partition table repair

Result: Completed sucessfully. Error code =0x0

Time taken = 1367271 ms

-----------------------

-----------------------

 

 

But still the windows doesn't load.

Mine is Windows 7 home basic.

My friend's is Windows 7 home premium...

Could this be the reason why repair is not sucessful.



#5 Anshad Edavana

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Posted 24 December 2013 - 07:59 AM

Hi

 

Sorry for the late reply. Sometimes Startup Repair may take a couple of tries to fix the issue. So please run Starup Repair at least three times and check whether it helps. If not, please try the below steps.

 

1. Boot to the CD and open the Command Prompt from  Recovery Tools menu. 

 

    windows-7-system-recovery-command-prompt

 

2. Enter the below commands one by one.

 

    BOOTREC /FIXBOOT

 

    BOOTREC /FIXMBR

 

This will write a new MBR to the disk.

 

Please report your findings with next reply.


Edited by Anshad Edavana, 24 December 2013 - 08:00 AM.


#6 pavithrakb

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Posted 24 December 2013 - 09:39 AM

Hi..

I tried repair 3-4 times but it didnt work.

I tried the command prompt method

 

for the command Bootrec/fixboot

it says: Element not found

I tried for 3-4 times. Still the same.

 

for the command Bootrec/fixmbr

The operation completed sucessfully.

 

Now what shd I do???


Edited by pavithrakb, 24 December 2013 - 09:39 AM.


#7 Greg62702

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Posted 24 December 2013 - 10:31 AM

Let me get this straight.  You have issues with the Western Digital Passport drive, and using it as the main Windows 7 drive, not an internal drive on the computer.  What OS are you running on the computer that you are connecting this Passport drive to, and also what is the manufacturer & model of the computer.



#8 pavithrakb

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Posted 24 December 2013 - 10:39 AM

Nope... I had a problem (bad sector: needs formatting error) in my 1TB WD.. (forget about my External HDD)

I tried to fix that problem with Partition Doctor table software and it crashed my windows.. (some how ended up with "operating system not found")

Now the problem for which I have posted here is My laptop's Hard drive error "Operating system not found".

Hope its clear now... :)



#9 Greg62702

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Posted 24 December 2013 - 01:28 PM

Make sure that you are not booting with the passport drive connected to the computer. Some newer laptops will see the USB attached drive, and attempt to look for a OS on it, vs boot up with the internal drive installed in the computer.

Check your bios, that the internal hard drive is first boot device, cd-rom/DVD is second boot drive.

#10 pavithrakb

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Posted 24 December 2013 - 01:56 PM

I checked... Those things are correct as you mentioned. still I cannot repair.



#11 Greg62702

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Posted 24 December 2013 - 05:41 PM

Download and burn something like Xubuntu, Ubuntu, Linux Mint to a DVD or CD-R, and have it pull the S.M.A.R.T. info up on your installed drive.  What is the manufacturer & model of your laptop?  If it uses a SATA interface for your hard drive, now may be the time that it is telling you to install a SSD, in place of the old school platter drive.

 

The good thing is, you can get the 120gb M500 from Crucial.com for $99.99 right now.  http://www.crucial.com/store/listmodule/SSD/~M500~/list.html



#12 Anshad Edavana

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Posted 25 December 2013 - 01:34 AM

HI

 

Which exact software you tried ?. Is it Partition Table Doctor or Active Partition Recovery ?.

 

What exact operation you did with it ? (fixing boot sector , changing boot flag etc).

 

When you boot from the System Repair CD, is it able to detect and attach your Windows installation as like in the below example ?.

 

windows-7-startup-repair-6.jpg


Edited by Anshad Edavana, 25 December 2013 - 02:09 AM.


#13 Greg62702

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Posted 25 December 2013 - 02:01 AM

HI
 
Which exact software you tried ?. Is it Partition Table Doctor or Active Partition Recovery ?.
 
What exact operation you did with it ? (fixing boot sector , changing boot flag etc)..

It is a PE disc. Normally costs $55 U.S., if you want to use it longer than the trial period.

#14 pavithrakb

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Posted 25 December 2013 - 12:46 PM

Greg: I don't know if my hard drive is SATA or not...

Jelitegd: I will try your method.

Anshad: No... mine doesn't show this option at all...

I just click next and tried the repair option.


Edited by pavithrakb, 25 December 2013 - 12:46 PM.


#15 Anshad Edavana

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Posted 25 December 2013 - 02:52 PM

 

 

No... mine doesn't show this option at all...

 

Which means there is no active partition is defined in the partition table despite Startup Repair tool's claim to repaired it. This would also explain the BOOTREC /FIXBOOT command's failure to update the boot code.

 

I hope the partition table is not severely damaged so please try the below steps.

 

1. Download Partition Wizard Home bootable disc image from the below link and write it to a blank CD. 

 

http://www.partitionwizard.com/partition-wizard-bootable-cd.html  (Tiny 50 MB bootable disk)

 

2. Boot from it and you will see a screen similar to the below example.

 

partition-wizard.png 

 

3. Now right click on the first tiny 100 to 300 MB sized first partition which will be probably labelled as System Reserved and then choose Modify--> Set Active. You will see it's status will be shown as Active in the Status column. Now click Apply button and reboot the machine.

 

An example video tut : http://www.partitionwizard.com/video-help/setactiveorinactive/setactiveorinactive.html

 

If the machine still refuses to boot, boot from the Partition Wizard CD and take a clear snapshot of the screen using a digital cam/cell phone and upload the image with next reply.






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