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Windows 7: "Bootmgr is missing" error upon startup, caused by human error

20 Jul 2012   #1
brienza112

Windows 7 Home Premium SP1 64 bit
 
 
"Bootmgr is missing" error upon startup, caused by human error

Today I got my new laptop and decided to dual boot Ubuntu and Windows 7 on it. After several hours of partitioning and researching, I ran into many issues. Eventually I decided to boot Ubuntu from a USB drive, open up Gparted, and delete any and all Linux partitions while expanding the size of the Windows partition back to normal.

Unfortunately, in the process, I must have made an error, because now upon startup I get the "bootmgr is missing" error. I don't have a recovery CD nor does my laptop have a CD drive, so that's out of the question, but I know for a fact my Hard Drive has a recovery partition on it. I want to restore my computer back to normal, keeping my old files if necessary. However, since I just got the computer today, I clearly don't have anything on there I can't afford to lose, so if I must do a factory reset I will.


My System SpecsSystem Spec
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20 Jul 2012   #2
derekimo

Microsoft Community Contributor Award Recipient

Windows 7 Pro 64 SP1
 
 

Welcome to the forum,

Sounds like quite a mess, you can try Bootmgr is missing - Fix

Since you don't have an optical drive you can USB Windows 7 Installation Key Drive - Create

Since you need a repair disc or an install disc to do that you'll want to create one

With the installer ISO for your licensed version here Official Windows 7 SP1 ISO from Digital River My Digital Life



You may just want to get a superior clean reinstall using the COA key on your computer,

Clean Reinstall - Factory OEM Windows 7
My System SpecsSystem Spec
21 Jul 2012   #3
brienza112

Windows 7 Home Premium SP1 64 bit
 
 

I have a problem with the very first step of this tutorial. I can't get into the advanced boot options of step 1 by pressing F8, and I'm not sure why. Is this just a matter of computer model, and I'm supposed to press a different button like F12? F12 for me is Boot Options, but it only lists Hard Drive, Network, Diagnostics, and Enter Setup. There's no repair your computer option like in the advanced boot manager.
My System SpecsSystem Spec
.


21 Jul 2012   #4
derekimo

Microsoft Community Contributor Award Recipient

Windows 7 Pro 64 SP1
 
 

Quote   Quote: Originally Posted by brienza112 View Post
I have a problem with the very first step of this tutorial. I can't get into the advanced boot options of step 1 by pressing F8, and I'm not sure why. Is this just a matter of computer model, and I'm supposed to press a different button like F12? F12 for me is Boot Options, but it only lists Hard Drive, Network, Diagnostics, and Enter Setup. There's no repair your computer option like in the advanced boot manager.
Which tutorial?

Have you made the bootable flash drive? Once you do that and plug it in, it should

be listed as an option in your F12, you need a repair disc or an install disc to get

the repair option, which is why I gave you the links to make a bootable flash drive

since you don't have a CD/DVD Drive.

What is the brand and model # of your laptop?
My System SpecsSystem Spec
21 Jul 2012   #5
brienza112

Windows 7 Home Premium SP1 64 bit
 
 

I accidentally posted in the wrong thread, sorry. This was the tutorial I was referring to

What I've done now is downloaded the W7 64-bit ISO, burned it to my flash drive using wintoflash, and I'm now reinstalling windows.

I have a Dell iM101z-3980BK notebook.

I'll update again when the installation is finished.

Edit: I accidentally installed Windows Ultimate. My computer works fine now, but I'm gonna do it all over again with Home Premium. Thanks for the help.
My System SpecsSystem Spec
21 Jul 2012   #6
derekimo

Microsoft Community Contributor Award Recipient

Windows 7 Pro 64 SP1
 
 

Sounds like you're getting there, thanks for posting back.

Once you have your computer setup and the way you want it, create a system image so you don't have to go through this again.

Backup Complete Computer - Create an Image Backup

Imaging with free Macrium

If you want to play with Ubuntu, I would suggest using a virtual machine like,

Virtualbox or VMWare, so you're not messing with partitions and windows boot files.
My System SpecsSystem Spec
21 Jul 2012   #7
brienza112

Windows 7 Home Premium SP1 64 bit
 
 

I think there's something wrong with that mydigitallife link. I downloaded the iso labeled with a "58997," yet when running wintoflash I got a message saying it was still W7 Ultimate. I'm gonna try and download the iso from a different website.
My System SpecsSystem Spec
21 Jul 2012   #8
derekimo

Microsoft Community Contributor Award Recipient

Windows 7 Pro 64 SP1
 
 

Quote   Quote: Originally Posted by brienza112 View Post
I think there's something wrong with that mydigitallife link. I downloaded the iso labeled with a "58997," yet when running wintoflash I got a message saying it was still W7 Ultimate. I'm gonna try and download the iso from a different website.
I wouldn't do that, that is the only official genuine links for Microsoft.

Try this instead of wintoflash,

Windows 7 USB/DVD Download Tool

You can also just run this tool Ei.cfg removal tool

To unlock all versions on that ISO as shown here,

Windows 7 Universal Installation Disc - Create
My System SpecsSystem Spec
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 "Bootmgr is missing" error upon startup, caused by human error




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