Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Operating system not found (after formatting)

11 Jun 2010   #1
TimothyVermeire

Windows 7
 
 
Operating system not found (after formatting)

Hello,

I just used Easeus partition manager to make some changes to my hard disks. I have two disks in my laptop, one which contained an old Vista OS, a recovery partition and a partition with some data, and another one with W7.
I decided to make some room by reformatting the disk with Vista, and splitting the disk with W7 into two partitions, the original one with the 7 OS and a new partition for recovery.

All of this went fine, until I tried to reboot, I get the classic "No operating system found".
I booted with the recovery cd, but at the screen where you are prompted to select your operating system, the list is empty. I think this is <b>not</b> a driver issue, because when I click load driver I can browse my hard drives just fine (which are also partitioned and formatted like I asked Easeus to do).
I just clicked next, and tried using the command line with the
Code:
bootsect /nt60 ALL /mbr
command but no luck, it tells me the "update may be unreliable" on the W7 disk because it was "locked during the update: access denied". It still gave the "OS not found" error when rebooting.
I also tried the automatic Startup Repair, which didn't change anything.

What's the next thing I should try?


My System SpecsSystem Spec
.
11 Jun 2010   #2
TimothyVermeire

Windows 7
 
 

Using
Code:
bootrec /scanos
I now know the there is one windows installation present: D:\Windows (which is what I expected).

Now when I try to add the OS to the boot list using
Code:
 bootrec /rebuildbcd
and selecting Yes when prompted, I get the error: Element not found.
My System SpecsSystem Spec
11 Jun 2010   #3
Tews

64-bit Windows 8.1 Pro
 
 

Do a repair install from the Windows 7 DVD .. This should resolve your issue ...
My System SpecsSystem Spec
.

11 Jun 2010   #4
TimothyVermeire

Windows 7
 
 

Quote   Quote: Originally Posted by Tews View Post
Do a repair install from the Windows 7 DVD .. This should resolve your issue ...
What repair install exactly? Do you mean one of the options in the sys recovery options (startup repair, system restore, ...) or the screen before that? Or the one where you are simply asked if you want to install W7? (where you can click "repair installation" or something.
My System SpecsSystem Spec
11 Jun 2010   #5
Tews

64-bit Windows 8.1 Pro
 
 

Quote   Quote: Originally Posted by TimothyVermeire View Post
Quote   Quote: Originally Posted by Tews View Post
Do a repair install from the Windows 7 DVD .. This should resolve your issue ...
What repair install exactly? Do you mean one of the options in the sys recovery options (startup repair, system restore, ...) or the screen before that? Or the one where you are simply asked if you want to install W7? (where you can click "repair installation" or something.
Repair Install
My System SpecsSystem Spec
11 Jun 2010   #6
TimothyVermeire

Windows 7
 
 

Quote   Quote: Originally Posted by Tews View Post
Quote   Quote: Originally Posted by TimothyVermeire View Post
Quote   Quote: Originally Posted by Tews View Post
Do a repair install from the Windows 7 DVD .. This should resolve your issue ...
What repair install exactly? Do you mean one of the options in the sys recovery options (startup repair, system restore, ...) or the screen before that? Or the one where you are simply asked if you want to install W7? (where you can click "repair installation" or something.
Repair Install
That seems to be what I need... I assume I am supposed to install W7 again on the other disk, and run it from there?

Edit: in fact what I said sounds pretty dumb, because I would then be repairing the new installation...

How can I start a repair install from within windows 7 if I can't even get in windows 7?...
My System SpecsSystem Spec
11 Jun 2010   #7
TimothyVermeire

Windows 7
 
 

Does anyone have more information?
My System SpecsSystem Spec
11 Jun 2010   #8
Tews

64-bit Windows 8.1 Pro
 
 

Boot from the DVD and select repair install.... follow the instructions in the linked tutorial..
My System SpecsSystem Spec
11 Jun 2010   #9
TimothyVermeire

Windows 7
 
 

Quote   Quote: Originally Posted by Tews View Post
Boot from the DVD and select repair install.... follow the instructions in the linked tutorial..
The linked tutorial says install repair can ONLY be accessed from WITHIN win7, which I can't access...

And I never heard of a "boot from DVD" option, am I missing something?
My System SpecsSystem Spec
11 Jun 2010   #10
TimothyVermeire

Windows 7
 
 

Okay, I get it now, I actually formatted the partition containing the MBR.

Now I have installed W7 on the first disk again (which contained the MBR) but it doesn't detect the other installation on the second disk (probably because the MBR is damaged).

How do I solve this?

None of the commands in the system recovery prompt from the installation DVD worked correctly...
My System SpecsSystem Spec
Reply

 Operating system not found (after formatting)




Thread Tools




Similar help and support threads
Thread Forum
New HDD, Operating System Not Found
I have searched the forum and have come across similar issues, but no solution for the specific situation I have. I have a Sony Vaio VPCEH laptop. Original HDD was a 320 GB SATA Western Digital Scorpio Blue. This hard drive crashed, and would not load Windows, just gave an error message saying...
Installation & Setup
Need Help. No operating system found
Recently my computer crashed and I had to turned it off via power button after restarting BSOD came up saying unmountable boot volume. So I used windows 7 recovery disk and then done the startup repair and restarted the laptop and removed disk. This time it says no operating system found so I...
General Discussion
Operating system not found...
I have a Sony Vaio VPC-EC2TFX/WI, Have tried rebooting several times with no change. This computer was working fine last night and when I tried to turn it on this morning, I got the Operating System Not Found message. Any help would be so appreciated!
General Discussion
operating system not found and no drivers were found eror
as usual I turned off my laptop and after a while a turned on again to use my laptop but it couldn't reach operating system and showed error : " OPERATING SYSTEM NOT FOUND" ! I tried all instructions to solve the problem and finally run by windows start up CD to re-install new windows. this...
Installation & Setup
Operating System not found
Hello SevenForums, today I've had a problem with my ACER Laptop, and I need help fixing this Black Screen Of Death. I started up my laptop today, and BOOM! An error popped up and I have no absolute idea how to fix it. Intel UNDI, PXE-2.1 (build 082) Copyright (C) 1997-2000 Intel Corporation ...
BSOD Help and Support


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:02.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App