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Windows 7: "Bootmgr is missing" before I can install W7


20 Jun 2009   #1

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 
"Bootmgr is missing" before I can install W7

I've decided to install Windows 7 on a machine without any other OS resident. The drive has been formatted to NTFS. When I insert the Windows 7 DVD, I get the "BOOTMGR is missing" message.

I did a bit of googling, and found out that this is actually a common problem with a fairly simple solution IF the OS is already installed. I found directions on how to make a system startup repair disk, but this requires the use of the OS in order to make the disk.

I'm wondering if there's a way to create this disk outside of the OS. From what I understand, this message is found with Vista as well. I do have a Vista machine, so I'm wondering if it would be possible to make the disk with the Vista machine and have it work with the Windows 7 one.

And I'm also wondering if, since Windows 7 is not yet installed on this machine, this repair disk will even do what I need, namely (I suppose) install bootmgr.

Any help would be most appreciated.

My System SpecsSystem Spec
.

20 Jun 2009   #2

Win 8 Release candidate 8400
 
 
bootmgr is missing

Quote   Quote: Originally Posted by cooltouch View Post
I've decided to install Windows 7 on a machine without any other OS resident. The drive has been formatted to NTFS. When I insert the Windows 7 DVD, I get the "BOOTMGR is missing" message.

I did a bit of googling, and found out that this is actually a common problem with a fairly simple solution IF the OS is already installed. I found directions on how to make a system startup repair disk, but this requires the use of the OS in order to make the disk.

I'm wondering if there's a way to create this disk outside of the OS. From what I understand, this message is found with Vista as well. I do have a Vista machine, so I'm wondering if it would be possible to make the disk with the Vista machine and have it work with the Windows 7 one.

And I'm also wondering if, since Windows 7 is not yet installed on this machine, this repair disk will even do what I need, namely (I suppose) install bootmgr.

Any help would be most appreciated.
First welcome to sevenforums.
Im wondering where you got the win 7 image from? and what you used to format the HD?

Waiting on more info
Ken
My System SpecsSystem Spec
20 Jun 2009   #3

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

Hi,

See if this helps:

disable AHCI mode for your disk controller in the system BIOS. Typically the controller has to be changed from AHCI mode to "IDE" or "ATA" mode.
My System SpecsSystem Spec
.


20 Jun 2009   #4

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 

Thanks for your prompt reply.

I d/l'd the .iso file directly from Microsoft's website, and used the Linux utility GParted to partition and format the disk, and then checked the disk for formatting errors and set the "boot" flag also using GParted. I've used GParted to create and format ntfs partitions on my XP machine also, without issues.


Best,

Michael
My System SpecsSystem Spec
20 Jun 2009   #5

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 

Thanks for the response, SIW2. My mb's BIOS has no AHCI setting. IDE's all I got to choose from. The mb is an older MSI running a 1.2GHz Athlon. Good enough for this test drive was my reasoning.

Best,

Michael
My System SpecsSystem Spec
20 Jun 2009   #6

Windows 7 Professional, Windows Longhorn 4074
 
 

You said that you had Win2000, so you might be able to do something with this:

How to Create an Emergency Repair Disk in Windows 2000
My System SpecsSystem Spec
20 Jun 2009   #7

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

You could try installing from a usb drive.

USB Windows 7 Installation Key Drive - Create
My System SpecsSystem Spec
20 Jun 2009   #8

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 

Quote   Quote: Originally Posted by ikilledkenny View Post
You said that you had Win2000, so you might be able to do something with this:

How to Create an Emergency Repair Disk in Windows 2000
Actually, I have Win2000 on disk right now -- it used to be this machine's OS until I decided to try Windows 7.
My System SpecsSystem Spec
20 Jun 2009   #9

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 

Quote   Quote: Originally Posted by SIW2 View Post
You could try installing from a usb drive.

USB Windows 7 Installation Key Drive - Create

Thanks, but this mb doesn't have the "boot from usb" capability. Heck, I just bought a new mb for another system a week ago (an ASUS) and it doesn't even support "boot from usb".
My System SpecsSystem Spec
21 Jun 2009   #10

Win7 Ulitmate x64, XP x86 (Dual Boot)
 
 

I've updated my profile to include my system specs, if this might help you answer my problems.

Best,

Michael
My System SpecsSystem Spec
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 "Bootmgr is missing" before I can install W7




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