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[Windows 7] How to dual Boot Windows.old?

I recently reinstalled my Windows 7, did not format it, that means that the files are all there on C:\Windows.old, but it doesn't show as dual boot.

How can I configure a dual boot option to boot in my old and new Windows 7?
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John86a
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John86a
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TommySzalapskiCommented:
Windows.old is not a boot partition, it's just backup files. To actually be able to dual boot follow this guide.
http://lifehacker.com/5126781/how-to-dual-boot-windows-7-with-xp-or-vista
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John86aAuthor Commented:
I remember some time ago when I reinstalled my Windows 7, windows automatically made dual boot with the new one and the old one.  But it didn't this time. All I need is some stuff from the registry..
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TommySzalapskiCommented:
Well, the registry files are stored at C:\Windows\system32\config
SAM, SECURITY, SYSTEM, SOFTWARE so those should be in windows.old
NTUSER.DAT is where HKEY_CURRENT_USER is and that's in 'documents and settings' so you should be able to find that too.
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John86aAuthor Commented:
I found a tool to edit NTUSER.dat, sam, security, system and software. It's called RegeditPro, worked wonders, I was able to recover the lost data.
Thanks for the partial answer.

http://www.robotronic.de/regeditProEn.html - here you can find the tool.
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aringanCommented:
you can even run msconfig and edit boot order
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John86aAuthor Commented:
After much research, regeditpro saved my day.
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