Windows 8 and 8.1 Forums


How to dual-boot Windows 8 with existing Windows 7.

  1. #1


    Posts : 7
    Windows 7

    How to dual-boot Windows 8 with existing Windows 7.


    I want to install the Windows 8 preview alongside my current Windows 7 system, so that when I boot my computer, it asks me which OS I want to boot into.

    I already shrank my internal HD by 50 GB and then created a new partition. The problem is I heard that new partition should be a Primary partition or else it will cause problems with my current Windows 7 system. Well I already had an Active Recovery Partition, a Primary Partition, and a my Boot Primary Partition (C drive). This is how it was set up by default. So when I created my new 50 GB partition for Windows 8, it is just a Logical Drive.

    What should I do to correctly set this up?

    Thank you!

    Click image for larger version

      My System SpecsSystem Spec

  2. #2


    Try deleting W and 8GB partitions and extend the C partition in to unallocated space, now you should have recovery partition and the C partition(296GB), again shrink the C partition whatever you need for W8.
      My System SpecsSystem Spec

  3. #3


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    One way is to use separate Hard Disk Drives, one for each OS installed.
    Screenshot below is Vista, Windows 7, Windows 8 32 &64.

    Click image for larger version
      My System SpecsSystem Spec


  4. #4


    Posts : 7
    Windows 7


    Quote Originally Posted by brummyfan View Post
    Try deleting W and 8GB partitions
    Thank you for the reply. Ok so I deleted my Windows 8 partition and then the 8 GB partition. It changed the Win 8 partition into 50 GB free space and then the 8 GB partition changed to 8 GB unallocated memory. Now the Extend Volume button on my C drive is greyed out. So I tried to create a New Simple Volume from the 50 GB free space but it created it as a Logical Drive again.

    Click image for larger version

    @theog Thanks for the suggestion, but I want to run this on a separate partition rather than a different hard drive.
    Last edited by hipwelljo; 14 Sep 2011 at 15:55.
      My System SpecsSystem Spec

  5. #5


    Quote Originally Posted by hipwelljo View Post
    Quote Originally Posted by brummyfan View Post
    Try deleting W and 8GB partitions
    Thank you for the reply. I just read a Toshiba bulletin that explains why there are 3 partitions. Since my computer didn't come with recovery CDs, I could make them and then delete the 2 extra partitions. But I'm not sure I even want the crapware that Toshiba includes.

    So, do you think it would be wise to delete the 2 extra partitions, not even make the recovery CDs, and then if I need to I can buy a brand new copy of Windows 7 and clean install it without any Toshiba crapware? Or will I run into problems since I don't have the Toshiba drivers...

    @theog Thanks for the suggestion, but I want to run this on a separate partition rather than a different hard drive.
    Hi,
    If you are not going to do a factory restore in the future you can safely delete the 8GB and 50GB partitions.
    EDIT: If you want to keep them, you need to use a third party utility like Partition Manager,
      My System SpecsSystem Spec

  6. #6


    Posts : 7
    Windows 7


    Sorry I edited my post after you replied lol
    See post #4 again.

    And also, can I delete the 1.46 GB partition as well?
      My System SpecsSystem Spec

  7. #7


    Posts : 7
    Windows 7


    UPDATE: I installed Partition Assistant 3.0 and it successfully added back my 58 GB to my C drive. So this is how it looks now:
    Click image for larger version

    Remaining problems:
    Notice that my 1.46 GB partition is Active. And Microsoft said here that if you change your Active partition, it will not boot if that partition does not contain the Windows boot files. So should I not delete that partition and leave it there? I thought it was just recovery and not where it stored the Windows boot files, and the C partition is even labeled Boot.
    How do I create a new Primary partition so that I can successfully install Windows 8 on it without affecting my Windows 7 setup?

    Again, thank you. I really appreciate your help!
      My System SpecsSystem Spec

  8. #8


    Simply do !
      My System SpecsSystem Spec

  9. #9


    Posts : 7
    Windows 7


    Quote Originally Posted by vrosa View Post
    Simply do !
    I wish it were that easy. If only you knew what I had to go through to get this far.
    Windows 8 better be amazing. Ok so this is my current situation:

    Click image for larger version

    Is there anything else I need to do before I install Windows 8 on the X partition? Will it cause any problems with my Windows 7 if I do it this way?

    Thanks!!
      My System SpecsSystem Spec

  10. #10


    Posts : 4
    Win7 Ultimate/ Win8


    Your last screen shot looks exactly how I set mine up, and win8 installed without any problems at all. I now get the dual boot option on startup.
      My System SpecsSystem Spec

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How to dual-boot Windows 8 with existing Windows 7.

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