MBR error 2

I see this error message pop up every time I boot lately. The system
comes up ok and runs fine, but ....

The solution seems to involve using bootrec, but that is not to be
found on my Win 10 pro machine.

How to proceed?


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Jason wrote:
I see this error message pop up every time I boot lately. The system
comes up ok and runs fine, but ....

The solution seems to involve using bootrec, but that is not to be
found on my Win 10 pro machine.

How to proceed?


This is a portion of my notes.

bcdboot C:\Windows # command available everywhere
# shoves files into \boot
# fixes the BCD
# Copies files from some source, as shown

bootrec /rebuildBCD # available on installer DVD or emerg CD ===
# "doesn't always fix stuff", a damp squib.
# repairs the BCD boot menu only.

But bootrec has other options.

bootrec /fixboot (writes a new boot sector to the system partition [PBR] )
bootrec /fixmbr (writes a MBR but does not overwrite the partition table)

If you need media to boot the machine with,

Start : Run : "control"

That opens Control Panels, then select Windows 7 Backup.
There should be a button on the left side of that window
which creates boot media. The media would be CD sized,
around 300-350MB or so. It's not an installer disc,
but the disc is big enough to have a Command Prompt.
And as well, it should have bootrec. You boot the disc made,
then do the command from the Command Prompt in Troubleshooting.

You could also try the Macrium Reflect emergency boot
CD and use the "boot repair" from the menu.

The least confusing situation, is when only the
boot drive is present in the computer, when you make
repairs. It's not helpful to have a lot of hard drives
plugged in.

Sometimes, when you use the "Troubleshooting" item on
a Microsoft optical disc, it attempts to search for the
OS, and "won't find a match" and won't let you proceed
with your repair attempt. So that's a possible outcome.
In such a case, you can try the Macrium Reflect repair.
It has the *same* criterion, and it's still going to
ask you where the OS partition is. But the difference is,
it won't reject your C: out of hand, and will make an
honest try. I've had the maddening situation where I
try the Win7 DVD and the Win10 DVD and neither of them
would give me the Command Prompt when I needed it.

There is another command called "bootsect", but my experience
in the past has been, it didn't seem to be putting
the correct 440 bytes of stuff.

https://docs.microsoft.com/en-us/win...d-line-options

If you need to fix the MBR, you can also copy 440 bytes from
a mounted Macrium .MRIMG over top of the MBR on the disk.
But the Microsoft commands would be... a trifle safer :-)

Paul