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Windows 7: Cannot dual boot after installing new OS.

24 Nov 2013   #1

Windows 7, Server 2012
Cannot dual boot after installing new OS.

Hi guys, apologies for my first post being a "Help me" but I've been attempting to fix my PC since Thursday night, and since the Microsoft forums are utterly useless I've not got much choice.

Basically, the PC I have came with Windows Home Premium x64 installed. I upgraded this to Ultimate x64 eventually.

I followed a TechNet walkthrough on dual booting W7 and Server 2012 (?Step-By-Step?- 4 Methods to Dual Boot Microsoft Windows 8 and Windows Server 2012 with or without Windows 7 - Blain Barton's Blog - Site Home - TechNet Blogs).

Everything went swimmingly and I got the server updated, AD installed, Exchange etc., but then when it came to booting back into W7 I was unable to.

On reboot, I don't even get the option, the PC boots straight into Server 2012. In my MSCONFIG all I'm being shown is Server 2012 as the primary and lone OS installed. I can look at my D: (the C: of my Windows 7) and see that all the files are still there, and I've not overwritten them. I'm unable to make the D: the primary/default boot partition, and just when it seems like settings have taken seat, I reboot and am back to square one.

If there's anyone who can help me access my Windows 7 OS, or at least knows of any KBs I can look at then please feel free to contribute. All suggestions are welcome.

Have a nice Sunday,

My System SpecsSystem Spec
27 Nov 2013   #2

Windows 7 ultimate x64

Hi LucaD, Welcome to Seven forums.

Try this, Contol Panel->System->Advanced System Settings. There is StartUp and Recovery click Settings.
In default OS select whichever OS you want and check Time to display operating systems. Select the time you need to select OS.
My System SpecsSystem Spec

 Cannot dual boot after installing new OS.

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