322 Posts

March 5th, 2011 20:00

Hello congilia

If you can boot the win7 recovery usb and get to a command prompt,

run diskpart and make win7 partition active then exit diskpart.

change to that drive              %sysroot%\windows\system32

then run                     BCDBOOT.EXE C:\Windows

that should install boot files onto windows 7 partition.

Hope this helps

Tom

2 Posts

March 6th, 2011 09:00

That worked like a charm :) thanks alot Tom 

1 Message

April 6th, 2015 07:00

I know this is old, but in shows up in googles search and some one in the future may see this a couple of years from now like I did.

So, basically, this did work... but I had to tweak it just a bit.  See, I have many drives connected, so my system drive according to BIOS is not , it's actually

I followed your guide, but when I tried to run BCDBOOT.EXE per your instructions, it just wouldn't work.  So, instead I did:  bcdboot e:\windows /s e: (p.s. - windows is not case-sensitive, so it works no matter what case you use); this specifies the exact, target drive letter instead of assuming based on your BIOS.  So, what happened was it kept attempting to run on my non-system and it kept giving errors.  When I pointed it to the exact drive (btw, to find out which drive letter is assigned to what, run diskpart, then cmdline: list volume), it finally worked.  


p.s. - I spent nearly 2 days messing with various command/cmdline programs, partition recovery/editing, etc.; nothing seemed to work, till I tried this out.  This whole issue started because I dual-booted XP/7 from the same disk (XP was the first partition, 7 was the second one).  So one day I foolishly (in 7's diskmgmt.msc) made 7 the active partition (instead of XP).  The problem was that booting was done from XP's partition, not 7.  So, the next day, I had to reboot and to my dismay, Windows 7 just wouldn't load anymore, it gave me this error:  BOOTMGR IS MISSING (etc.)  That's how this whole mess started.  But, now, through trial and error, I got it up and running, but only Windows 7 (which was what I wanted anyway [and luckily I had already made complete backups on external drives prior to screwing everything up]).

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