Missing boot manager and no operating system found

I can't boot my 1 yr old Vista OS. It gets as far as the MS copyright screen with the traveling green bars, then reboots itself.  If I try to boot from the Vista CD to do a repair all repair attempts fail. In the system recovery options there are no operating systems listed to choose from. "Load Drivers" appears to be a dead end.

The RAID BIOS on the Gigabyte motherboard says the disks are "Functional" and I can boot into Knoppix and Ubunto with no problems.  In other words, the MB and hardware seem to be just fine. Also the MB drivers for the disk are working.

If I try the "Startup Repair" option is says it cant do it - MissingBootManager.

"System restore" can't find a Windows installation.

Trying "bootrec /fixboot" from the command line reports it was successful, but didn't fix the problem.

Do I have anything left to try before re-installing Vista? Can I preserve the user data on the HD if I do re-install Vista?

For the record, twice I've been able to boot OK since this problem began, but the next time I try I'm back where I was. In other words, it works a small part of the time.  What's going on?


RAID could be the issue with the fix not taking, and possibly the underlying cause. Check with Gigabyte
as there may be built-in methods for the RAID controller and/or known issues.

This is the troubleshooter some which you have tried however you may need to run through this more
than once if it is repairable at all.

Try Startup Repair -

This tells you how to access the System Recovery Options and/or use a Vista Disk

Try StartUp Repair from Recovery Options or Vista disk.

How to do a Startup Repair

Unable to boot in windows vista- windows boot configuration data file is missing required information -
Repair Corrupt Boot Manager

How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair
startup issues in Windows Vista

How to fix "BOOTMGR is missing" in Windows Vista

Error message when you start Windows Vista: "The Windows Boot Configuration Data file is missing
required information"

Vista Tip: Repair "BOOTMGR is missing" error - a quick how to

See this section here - To repair/rebuild the Boot Config Data Use the Bootrec.exe Tool


If you do not have a Vista disk you can borrow a friends as they are not copy protected. Your System maker
will also sell the physical DVD cheap since you already own Windows. Also you can make a repair disk on
another computer.

If you need to make repair disks - these help repair Windows not re-install.

How to Make a Bootable Disk in Vista

Download: Windows Vista x64 Recovery Disc

Download: Windows Vista x64 Recovery Disc

How to Make a Windows Vista Repair Disk If You Don’t Have One

Hope this helps.

Rob - Bicycle - Mark Twain said it right.
Rob Brown - Microsoft MVP - Windows Insider MVP 2016 - current
Microsoft MVP Windows and Devices for IT 2009 - 2020

Was this reply helpful?

Sorry this didn't help.

Great! Thanks for your feedback.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this reply?

Thanks for your feedback.


Question Info

Last updated April 22, 2020 Views 40,614 Applies to: