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Windows 7: Dual boot 2 windows 7 64 bit problem

15 Jan 2013   #1

windows 7 ultimate 64 bit
Dual boot 2 windows 7 64 bit problem

Hello guys! Boy, am I in some trouble

I've been running dual windows os` for a long time now without problem, always keeping the newer one, and replacing the older one when I need a clean format, and somehow this time I messed up.

Before I was running 2 windows 7 64 bit, each on it's own partition on a seperate HDD, and would always get the boot menu on startup asking which i wanted to boot. I did my usual shtick, formatting the drive with the older OS, re-partitioned, and installed a clean version (also 7 64 bit), everything seemed to go smoothly, except now no matter what I do it only boots to the new OS. I'm not sure how to figure out which HD has which OS, but when I mess around with the boot order in the bios and put the one I think has the old OS on top I get a message saying "BOOTMGR is missing".

I dunno what tech specs are relevant, but I have 2 physical HD's, each partitioned into a smaller "system" partition, and a larger "data" one

please help?

My System SpecsSystem Spec
15 Jan 2013   #2
Microsoft MVP


Please post back a screenshot of your maximized Disk Management drive map and listings:

1. Type Disk Management in Start Search box.
2. Open Disk Mgmt. window and maximize it.
3. Type Snipping Tool in Start Search box.
4. Open Snipping Tool, choose Rectangular Snip, click New, draw a box around full drive map and all listings.
5, Save Snip, attach using paper clip in Reply Box.

Tell us what is on each partition.
My System SpecsSystem Spec
15 Jan 2013   #3

windows 7 ultimate 64 bit

Cool, Thanks! Screenshot attached

c: - new OS, windows 7 ult 64, works
e: - data (movies, games, etc.) for C
d: - old OS, windows 7 ult 64, worked right up to the moment I installed the new one
g: - data for D
m: - old irrelevant hdd, file storage

the others are all external hdd's

the setup with the hdd's was identical the past 3 times i installed a fresh OS

Attached Thumbnails
Dual boot 2 windows 7 64 bit problem-capture.jpg  
My System SpecsSystem Spec

15 Jan 2013   #4
Microsoft MVP


When you reinstalled to D it should have edited the boot files on Disk0 System Reserved partition to configure the Dual Boot. Only System Reserved should be marked Active since it is the System partition. So remove the Active flag from D and I: Partition - Mark as Inactive - Windows 7 Forums

Once you've done this install to C EasyBCD (click Download - no Name or Email required),
on Edit OS Menu tab delete any listings but C, then on Add OS Entry tab add Win7 on D, give it a unique name. Save and reboot.

If this doesn't give a working Dual Boot menu then run a few Startup Repairs on the non-working OS to see if it will recover it.
My System SpecsSystem Spec
16 Jan 2013   #5

windows 7 ultimate 64 bit

You, sir, are a golden god of benevolence and justice for all. Worked perfectly, everything running smooth as silk now.

Thank you thankyouthankyouthankyou :)
My System SpecsSystem Spec

 Dual boot 2 windows 7 64 bit problem

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