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Windows 7: Dualboot problem

27 Mar 2010   #1

Windows 7 Professional x86
 
 
Dualboot problem (Solved)

I've had Windows XP installed on my desktop for quite some time and I wanted to dualboot with Windows 7 for Dx10/11 support for some games. I have three HDD's, with XP installed on "1" and the new Windows 7 installed on "2", "3" is purely for mass data storage. I decided to install Windows 7 on 2 without formatting the drive and almost everything went as well as one could hope.

However, Windows 7 changed the name of the drives (all three are SATA btw) so that now 2 is C: and 1 is D: and XP won't start at all. I tried using EasyBCD from this tutorial: Dual Boot Installation with Windows 7 and XP

but when I try to start XP it gives me the "NTLDR missing" error. I'm wondering if the problem lies within Windows 7 changing the drive letters for me (I had no fingers in that happening, I'm sure.) and XP refusing to boot from anything but C:

So I'm asking if there's another solution or how I should go about changing the drive letters without messing everything up even more.

My System SpecsSystem Spec
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27 Mar 2010   #2

Windows 7 Professional x64
 
 

Welcome!

The drive letter change is normal; each OS will change the letter of its volume to C.

Try marking the Windows 7 partition as active and running a startup repair.

Hopefully that will add XP to the boot loader.
My System SpecsSystem Spec
27 Mar 2010   #3

Windows 7 Professional x86
 
 

Will do, thanks a lot. I'll be back in a while
My System SpecsSystem Spec
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27 Mar 2010   #4

Windows 7 Professional x86
 
 

"Startup repair could not detect a problem"
However, I have two active HDDs in the discmanager, the XP one and the Windows 7 one. Could this be a problem?
My System SpecsSystem Spec
27 Mar 2010   #5

Windows 7 Professional x64
 
 

No, that's not a problem. Each hard drive will have its active partition; that is the one that is looked at during the boot.

Now what happens if you remove the Windows 7 drive, and just try to boot from the XP one?
My System SpecsSystem Spec
27 Mar 2010   #6

Windows 7 Professional x86
 
 

I physically unplugged everthing except the XP drive and XP booted just fine.
EDIT: It's C: again, pretty obviously. But I wanted to say that I noticed that only the Windows 7 drive had one of those things on it's pins. Plastic cap that used to set slave/master on old ATA drives (don't know english name sry)
My System SpecsSystem Spec
27 Mar 2010   #7

Windows 7 Professional x64
 
 

It looks like the Windows 7 BCD isn't working right.

Download EasyBCD 2.0 (free, but you have to register first), and install it.

In the Add or Remove Entries tab, create a new entry for XP.

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My System SpecsSystem Spec
27 Mar 2010   #8

Windows 7 Professional x86
 
 

It's working now!
Thanks a lot, 2.0 solved it. (I also had to overhaul the HDD boot order because my PC is speshool.)
My System SpecsSystem Spec
27 Mar 2010   #9

Windows 7 Professional x64
 
 

Great, thanks for keeping us posted.

Glad it's working out now.

Let us know if you have any more questions.
My System SpecsSystem Spec
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 Dualboot problem




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