Windows 8 and 8.1 Forums


Computer dual booting when I don't want it to...

  1. #1


    Posts : 8
    Windows 8.1

    How do I prevent my computer from dual-booting?


    I hope this is the right section for this.

    Here is the backstory:

    I ran Windows 7 on a 1TB hard drive for a couple years, and then decided this past January to make the upgrade to Windows 8. I also purchased a 128GB SSD for my system. I installed 8 on my SSD and kept 7 on my HDD (to be certain I had all important files backed up). Last night, I felt confident that I had gotten everything I needed, so I reformatted the large partition on that HDD (the smaller one said system reserved, and wouldn't let me format it).

    When I rebooted my system, it asked me to choose my operating system. So I went into my boot options and made sure it was looking at the SSD first. I still received the dual boot screen.

    Next, I went into disk management and set the system partition on the HDD to inactive. That caused my machine not to boot. I used Partition Wizard to set my SSD to the active partition, but that gave me a boot error that the BootMGR was missing or corrupt. So, I set the HDD system partition back to active, and my machine works all fine and dandy.

    Now, how do I get rid of any trace of 7 from my machine? Why won't my machine boot without that HDD partition being active? Are the 8 boot files located there? Any help would be greatly appreciated.

    -Doug

      My System SpecsSystem Spec

  2. #2


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


    Physically disconnect the Windows 7 HD Drive.
    Make the Windows 8 SSD, disk0 & first HD boot in BIOS.Also connected to the first Sata port on the MOBO.
    Than do a Auto Repair first,

    How to do a Auto Repair:
    Automatic Repair - Run in Windows 8
    Note: You may need to do startup repair 3 to 4 times.
    Startup Repair - Run 3 Separate Times - Windows 7 Support Forums



    When Windows is booting OK, replace Windows 7 HD Drive back in, as Disk 1 & make sure you mark the HD Drive INACTIVE:
    Partition - Mark as Inactive - Windows 7 Support Forums

    If you have NO DATA on Windows 7 HDD, you can clean the HDD.
    Disk - Clean and Clean All with Diskpart Command - Windows 7 Support Forums
    Than partition & format
    Partition or Volume - Create New - Windows 7 Support Forums
      My System SpecsSystem Spec

  3. #3


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Win+X->Run->Msconfig then click on Boot tab and delete the Windows 7 entry
      My System SpecsSystem Spec

  4. #4


    Posts : 8
    Windows 8.1


    theog, that fixed it! Only took 1 run of Automatic Repair.

    Thank you very much.
      My System SpecsSystem Spec

  5. #5


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


    Quote Originally Posted by DougTech View Post
    That fixed it! Only took 1 run of Automatic Repair.

    Thank you very much.
    You are welcome, well done.
      My System SpecsSystem Spec

  6. #6


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


    Quote Originally Posted by topgundcp View Post
    Win+X->Run->Msconfig then click on Boot tab and delete the Windows 7 entry
    That would only remove the Windows 7 entry on the Windows 7 HDD, & not add the Windows 8 Boot files to the SSD.
      My System SpecsSystem Spec

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