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Windows 7: BOOTMGR is missing

02 Jun 2010   #1

Windows 7 x64
BOOTMGR is missing

I just did a re-installation of Windows 7 x64 on my computer, and I am getting the dreaded "BOOTMGR is missing" error. The previous operating system was also Windows 7 x64. I have 4 internal HDD, but I am reinstalling to the same drive that I originally used. I reformatted the drive when I did the installation.

I have done a lot of searching on this topic to try to find a solution. I'm amazed at how common this error appears to be, and yet there doesn't seem to be a clear and consistent answer for solving it. Why is this so difficult to resolve? Can anyone help me get this fixed?

My System SpecsSystem Spec

02 Jun 2010   #2

Windows 7 Pro 64bit build 7601 SP1

Boot with the install disk and do repair.
My System SpecsSystem Spec
02 Jun 2010   #3

Windows 7 x64

I tried that. I clicked the repair option, but it didn't fix the problem. Thanks.
My System SpecsSystem Spec

02 Jun 2010   #4

Windows 7 Pro 64bit build 7601 SP1

This is from a user here raj1402 Try this method:

you can rebuild the BCD store by using the Bootrec.exe tool in the Windows Recovery Environment. To do this, follow these steps: - Get your Windows 7 installation DVD and pop it into your drive.
- Then restart your computer.
- Press a key when you are prompted.
- Select a language, a time, a currency, and a keyboard or another input method, and then click Next
- Click Repair your computer
- Click the operating system that you want to repair, and then click Next
- In the System Recovery Options dialog box, click Command Prompt
- Type bootrec /rebuildbcd and then press ENTER

• If Bootrec runs successfully, it will present you with the installation path of a Windows directory. To add the entry to the BCD store, type Yes . A confirmation message appears that indicates the entry was added successfully.

• If Bootrec cannot locate any missing Windows installations, you must remove the BCD store, and then you must re-create it. To do this, type the following commands in the order shown below: (Remember to press ENTER after each command)

bcdedit /export C:\BCD_Backup

ren c:\boot\bcd bcd.old

bootrec /rebuildbcd

- Restart the computer.
My System SpecsSystem Spec
02 Jun 2010   #5
Microsoft MVP


Always unplug all other HD's when installing Windows 7 unless you want to create a dual boot with an older existing OS.

It is possible you have boot files on one of the other HD's interfering with Windows 7 install.

Please post back a screenshot of your full Disk Management drive map and listings, using Snipping Tool in Start Menu, attaching file using Paper Clip in Reply Box.
My System SpecsSystem Spec
02 Jun 2010   #6

Win 7 64 Pro

My System SpecsSystem Spec
02 Jun 2010   #7

Windows 7 x64

metalmania31, thanks for the instructions. I followed your directions. Bootrec did not run successfully (no Windows installations were found), so I followed your other instructions. The instruction "rename c:\boot\bcd bcd.old" return an error message that indicates the file could not be found. I can confirm that the boot directory exists, but the file could not be found within the directory. I executed the third instruction anyway and rebooted. The problem still persists.

Gregrocker, I cannot capture the screen shot that you requested because I cannot boot into Windows. The BOOTmgr error message happens before the operating system can load. I can't get in to Windows at all.
My System SpecsSystem Spec
02 Jun 2010   #8

Windows 7 Pro 64bit build 7601 SP1

Ok do what Greg said unplug all the hdd's except the one you need to install on and try reinstalling again.
My System SpecsSystem Spec
02 Jun 2010   #9

Windows 7 x64

I have unplugged all other drives, and I'm in the process of doing a clean install on the single remaining drive. I believe this will work, but what will happen when I plug in the other drives? Will it once again find the old files and hose up my new installation?
My System SpecsSystem Spec
02 Jun 2010   #10

Windows 7 Pro 64bit build 7601 SP1

Well lets get it installed and go from there.
My System SpecsSystem Spec

 BOOTMGR is missing

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