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: Please help! OS Not Found??

16 Feb 2011   #1

Windows 7 64bit
Please help! OS Not Found??

Hi Folks,

Hope someone can help - because I'm baffled at this stage!

Got a BSOD the other day (IRQL...) Ran WhoCrashed and found it was the ntoskrnl file causing bother. Got a fix from the MS website for the blue screen error and all was ok then. (Also, ran memtest86 and all ok). But then another BSOD (can't remember full name but it contained 'Exception')

Everything i checked seemed to relate to drivers. Decided to try Driver Verifier. Created a restore point and rebooted. BSOD again a short time later. Then when it reboots, my laptop says:

PXE-E61: Media test failure, check cable
PXE-M0f: Exiting Intel PXE ROM.
Operating System Not Found

I think this usually points to HDD issue. But I checked the HDD connection etc and all is ok. Ran Seagate HDD diagnostic and everything fine. Can see all the files when I connect it to a second laptop. Shows in BIOS no problem.

I read that you can disable driver verifier using an offline registry utility. Tried this but not 100% sure how to use it so quit! (NT Password and Registry editor)

When I run the W7 recovery, it does not show me Windows 7 in the list of OS. Yet when I run bootrec.exe /fixmbr etc, all passes fine.

Can anyone help?! I'm going out of my mind! Your help is very much appreciated :)

My System SpecsSystem Spec
16 Feb 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 x64

Would have more options if it was a desktop machine.
Have a look at this thread before attempting a reinstall of the operating system at least though. There are some recovery methods you haven't tried yet, also some additional bootrec commands.
Bootmgr is missing - Fix <---link
My System SpecsSystem Spec
17 Feb 2011   #3

Windows 7 64bit

Quote   Quote: Originally Posted by Maguscreed View Post
Would have more options if it was a desktop machine.
Have a look at this thread before attempting a reinstall of the operating system at least though. There are some recovery methods you haven't tried yet, also some additional bootrec commands.
Bootmgr is missing - Fix <---link
Thanks for the reply Maguscreed. :)

I ran the command prompts in the thread, but unfortunately they didn't work. However, when I ran bootrec /RebuildBcd, it said that it found an installation of windows, and did I want to add this to the boot menu (yes, No, All).

I decided to google this, and I came across some forum posts elsewhere where some people were having issues with dual booting with XP and W7. Someone mentioned using a free partiton manager (Partition Wizard Bootable CD allows user to boot computer directly to manage partition.) and going in to make the partition with windows 7 a primary partition and then make it active.

I didn't think this would work, but decided to burn the program to disk and run it (I had nothing to lose!). My C: drive partition was primary, but inactive, so I was able to right click it and make it 'Active'. Rebooted and got the Bootmgr is missing message as in the thread link you gave. Ran the Windows 7 recovery disc. Low and behold, the OS was showing in the list. Did a startup repair and rebooted - everything is fine now!

Eventvwr is showing clean now also. No errors

Many thanks for the point in the right direction

Still baffled though as to how it happened in the first place (partition inactive) and how there are now no errors in eventvwr.
My System SpecsSystem Spec


 Please help! OS Not Found??

Thread Tools

Similar help and support threads
Thread Forum
HDD not found in Windows Installation but found in BIOS
So it's a long story. I hadn't had Microsoft Net Framework on, so I turned it on. Then my PC randomly crashed. Tried to reboot but it got stuck in the crash then reboot circle. I tried my hardest to fix it but I couldn't find anything to fix it so I decided to just, reinstall windows. I made...
Hardware & Devices
USB disc not found at boot but is found when restarted
Hello all, I've had this issue for quite some time now, it never really bothered me that much, but it is annoying, so I thought I'd give it a shot to see if anyone could help me out. I've got 2 external USB drives, one on 2 Gb and one on 4 Gb. the 2Gb drive is no issues at all. Works...
Hardware & Devices
Lost Pwr During Defrag - FOUND folder not found
Last night was using Auslogics to defrag an external WD 1.5TB BU drive... 2 hours in we had a power loss...lights and TV went out and came back on. The laptop that was running the Auslogics had a batt, but the external drive lost power in the middle of the defrag process. Turned everything off for...
Performance & Maintenance
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
Network drive found but not found?
Hi I'm having a problem that is causing me to pull my hair out. I hope someone can help. I'm using a Vernatim media share 1 tb network drive on my LAN to store things like my iTunes library. Well yesterday it started not allowing me to login through windows. I deleted the mapped share and tried to...
Network & Sharing

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 05:46.
Twitter Facebook Google+