Windows 7 bootmrg

blake vanderpol · Feb 19, 2014

so i plugged in my SATA harddrive to my desktop computer to install windows 7 on it install went fine im using the harddrive right now on my desktop right now with windows installed but when i went to plug in into my laptop it says bootmrg is missing any ideas?

COLGeek · Feb 19, 2014

I assume you also have a HDD installed in the desktop as well. Correct?

If so, Windows installed part of itself on your internal drive (that is why the drive in question works on the desktop and not on the laptop).

Windows will always install its boot sector to the first HDD on a system if present. That is why when users install Windows to a SSD, it is recommended to disconnect any HDDs until after Windows is installed.

You can try to repair Windows or just re-install with the single drive attached.

blake vanderpol · Feb 19, 2014

how will i install in with the single drive if i need to have the one with windows on it

COLGeek · Feb 19, 2014

The best way to install Windows is with only a single HDD attached. That way Windows does not write files to any other HDDs.

Are you installing from a DVD or USB device? Also, why aren't you just installing Windows directly on the laptop?

mbreslin1954 · Feb 19, 2014

If you leave the SSD in the laptop and boot the laptop from a Windows 7 install disk, you can get to the command prompt (I think you have to go into Repair, not sure, it's been a while), and then run the command below to restore all the boot files to the SSD:

bcdboot c:\windows /s c:

I've run into this problem a number of times in the past, and this has solved it.

[EDIT] My notes indicate you will have to change your drive to the DVD drive and directory to "boot", then run the bdcboot command:

Change directory to dvd:\Boot
bcdboot c:\windows /s c:

COLGeek · Feb 19, 2014

There doesn't appear to be a SSD in the mix here. It sounds like the OP attempted to install Windows to an external HDD via a desktop (with its own internal HDD).

mbreslin1954 · Feb 19, 2014

Thanks, I don't know where I got the SSD idea from.

COLGeek · Feb 19, 2014

It is the same problem users encounter when installing Windows to a SSD with a HDD attached. Makes perfect sense and the fix is the same.

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