Windows 8 and 8.1 Forums


Install Win7 as Dual-Boot on Existing Win8 Laptop

  1. #1


    Posts : 10
    Win7, Win8

    Install Win7 as Dual-Boot on Existing Win8 Laptop


    I have a question on the best way to install Windows 7 as a dual boot on an existing Windows 8 installation on a new Asus Laptop. Most of the tutorials I've seen assume the pre-existing installation is Windows 7, and say that Windows 7 needs to be installed first, not an option when your Win8 comes pre-installed.

    I have an Asus F75, and here is the partitioning:
    1. 300 MB EFI System Partition, FAT32
    2. 900 MB NTFS Recovery Partition (would seem to be the MS Reserved partition, is that correct?)
    3. 279 GB NTFS OS Partition
    4. 398 GB NTFS Data Partition
    5. 20 GB NTFS Recovery Partition

    It sounds like after installing Windows 7, the boot menu will be the Win7 text boot selection menu if you use that as the default OS, which is what I plan on doing, so I believe there isn't anything I need to do to that, is that correct?

    I have turned of Fast Boot in Win8, and disabled Secure Boot in the system BIOS.

    What should I do about the existing Data partition, which will be the Win7 partition. Should I:
    a. Leave that intact and simply install Win7 to it, or
    b. Delete the partition, install Win7 and allow the install to manage the unallocated space?

    Do I have any other considerations other than collecting all the Win 7 drivers for the laptop (which I have already done)?

      My System SpecsSystem Spec

  2. #2


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


    Note   Note

    When dual booting with Windows 8 Preinstalled & Windows 7

    Follow Step one to five in this tutorial:
    Downgrade Windows 8 to Windows 7
    Warning you must have the uEFI/BIOS firmware setting in Step Three set.

    Make sure you read the NOTE at Step three.


    Than follow this tutorial: (installing in uEFI mode.)
    Dual Boot Installation - Windows 8 and Windows 7 or Vista




    For Ref:
    UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Help Forums
      My System SpecsSystem Spec

  3. #3


    Posts : 10
    Win7, Win8


    Thanks theog.

    I finally figured out how to get to the boot menu for the BIOS on this Asus F75, it was the ESC key, not F8 like Asus desktop motherboards, and am good to go on steps 1 - 5 in this tutorial:
    Downgrade Windows 8 to Windows 7

    But I have a question on this one, Dual Boot Installation - Windows 8 and Windows 7 or Vista, as the tutorial was actually written for installing Windows 8 as dual-boot with Windows 7 as the pre-installed verson, not the other way around.

    For step 6, To Install Windows 8 from within Windows 7 or Vista to Dual Boot, I had not heard of starting the install this way from within Windows, running setup from the sources folder. Will this also work the other way around, for installing Windows 7 from within Windows 8?
      My System SpecsSystem Spec

  4. #4


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


    For step 6, To Install Windows 8 from within Windows 7 or Vista to Dual Boot, I had not heard of starting the install this way from within Windows, running setup from the sources folder. Will this also work the other way around, for installing Windows 7 from within Windows 8?
    YES, If you have step 1 to 5 OK.
    or
    just boot Windows 7 x64 DVD in UEFI mode.

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    Posts : 10
    Win7, Win8


    Thanks. Backing up now before installing the dual boot.
      My System SpecsSystem Spec

  6. #6


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


    Nice to have someone that backs up.
      My System SpecsSystem Spec

  7. #7


    Posts : 10
    Win7, Win8


    Backups seems to be useless, and I'm stuck on attempting repairs.

    Using Paragon Partition Manager 2013 Free (listed as Win8 compatible) I adjusted the size of the data partition to make it smaller, and lowered the size of the OS partition, and was going to install Win7 on the unallocated space, but at the end of shrinking the OS partition, it said there were minor inconsistencies. I ran chkdsk, and the system stuck in attempting repairs.

    I've tried recovering with both the Recovery partition and the Recovery USB media that I created, and both attempts failed, saying a required partition was not present.

    After booting with the Acronis recovery disc, both the OS and Data partitions were gone. I recovered the OS partition with Acronis 2014, which was supposedly successful, but still stuck in "attempting Repairs", and can't get past that to boot. The backup images (full disk image) are on a NAS which is accessible after booting from the Acronis recovery disc.

    Any suggestions?
      My System SpecsSystem Spec

  8. #8


    Posts : 10
    Win7, Win8


    Wait....it may have finally fixed, but have to go out and check when I get back.
      My System SpecsSystem Spec

  9. #9


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


    1) Partitioning Step 3.

    Dual Boot Installation - Windows 8 and Windows 7 or Vista


    2) The Recovery USB drive & Recovery Partition can be very problematic.


    3) I only use Windows, Paragon, & SSR Desktop Edition for back software.
    But sounds like you maybe using the Windows 7 version of Acronis.
      My System SpecsSystem Spec

  10. #10


    Posts : 10
    Win7, Win8


    But sounds like you maybe using the Windows 7 version of Acronis.
    Actually, it's the newly released Acronis True Image 2014.

    What happened after the restore is that it goes to diagnosing, then attempting repairs, and it finally boots, and I end up with 2 extra small partitions at the end of the drive just before the Restore partition. I've tried this twice, and it's repeatable. Even though I added the Safe boot options before the backup, they are gone.

    Got to where I would start to install Windows 7, and it stalled at the first screen booting from the DVD. Trying to run setup from the Sources folder, if I tried to get updates (step 6E in the tutorial), it failed immediately, but without that, the install starts, it rebooted twice, and now seems stalled on a Starting Windows screen. I'll give it another 45 minutes or so, and force a restart and see if it will continue. (i5 2.6 GHz processor with 6 GB RAM, so it's shouldn't be REAL slow).
      My System SpecsSystem Spec

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