Windows 8 and 8.1 Forums

Windows 8 i 7 dual boot problem

  1. #11

    Posts : 54
    Windows 8 Pro

    Il' try this.

      My System SpecsSystem Spec

  2. #12

    Posts : 54
    Windows 8 Pro

    Here is the video of problem.

      My System SpecsSystem Spec

  3. #13

    Posts : 54
    Windows 8 Pro

    Quote Originally Posted by davehc View Post
    Put the Windows 8 install disk in and boot up. Use the Start up repair. This will give you Windows 8, in the dual boot menu, as the default. Don't change it to Windows 7 or you will get the same error.
    It doesnt work.I get 0xc00000c9 I/O error...
      My System SpecsSystem Spec

  4. #14

    Posts : 1
    Windows 7 Home Premium

    have you installed and used in windows 7 (before the problem) some softwares to change the boot image like "Win7BootUpdater"?
    I've found problem with this program, because it modify the winload.exe on windows 7 directory, so the new winload.exe installed from windows 8 doesn't not exist anymore; and at the boot of windows 7 i've got a winload.exe error. So from windows 8 i've replaced the backup file of winload.exe and after i could work again on my windows 7 o.s.
      My System SpecsSystem Spec

  5. #15

    Posts : 135
    XP, Win7, Win8_Eval

    You can try "Dual-boot Repair" tool from Visual BCD package.
    1. Run "Dual-boot Repair" click on "Automatic Repair" (program should say that Windows 8 is found and will be the default boot entry) - this will rewrite boot files

    2. Run sfc for Win 7
    SFC /SCANNOW Command - System File Checker - Windows 7 Forums

    Check if Win 7 can boot properly.
      My System SpecsSystem Spec

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Windows 8 i 7 dual boot problem
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