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Sunday, January 3, 2010

Vista Oddities, Missing BOOTMGR.exe error

One of the odd things I have run into installing and repairing Vista systems is that Vista has a nasty habit of installing its boot files on the first active drive or partition it finds, so it is possible to have system files on one drive or partition while boot files can reside on another. If this happens and something happens to the drive or partition with boot files on it this will make tour system unbootable and get a BOOTMGR.exe missing or corrupt error.

After lots of research I found probably the only fixes that will allow you to get your system back to full running order. I found this on Microsofts Vista forum.
Hope this helps someone.

To resolve this problem, use the following methods in the order in which they are presented.

Method 1: Repair the BCD store by using the Startup Repair option
You can use the Startup Repair option in the Windows Recovery Environment to repair the BCD store. To do this, follow these steps: 1. Put the Windows Vista installation disc in the disc drive, and then start the computer.
2. Press a key when you are prompted.
3. Select a language, a time, a currency, and a keyboard or another input method, and then click Next.
4. Click Repair your computer.
5. Click the operating system that you want to repair, and then click Next.
6. In the System Recovery Options dialog box, click Startup Repair.
7. Restart the computer.


Method 2: Rebuild the BCD store by using the Bootrec.exe tool
If the previous method does not resolve the problem, you can rebuild the BCD store by using the Bootrec.exe tool in the Windows Recovery Environment. To do this, follow these steps: 1. Put the Windows Vista installation disc in the disc drive, and then start the computer.
2. Press a key when you are prompted.
3. Select a language, a time, a currency, and a keyboard or another input method, and then click Next.
4. Click Repair your computer.
5. Click the operating system that you want to repair, and then click Next.
6. In the System Recovery Options dialog box, click Command Prompt.
7. Type Bootrec /RebuildBcd , and then press ENTER. • If the Bootrec.exe tool runs successfully, it presents you with an 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 the Bootrec.exe tool 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 in which they are presented. Press ENTER after each command.
Bcdedit /export C:\BCD_Backup
ren c:\boot\bcd bcd.old
Bootrec /rebuildbcd

8. Restart the computer.

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