Windows 10/7 Dualboot doesnt boot / error

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  1. drpas's Avatar
    Posts : 10
    windows 10
       #1

    Windows 10/7 Dualboot doesnt boot / error


    Hello,
    I wanted to install windows 7 and 10 dualboot. I was running windows 10 on my ssd.
    I created a new partition on my hdd, removed my ssd (with windows 10 on it) and then i installed windows 7 on the hdd partition.
    Windows 7 was successfully installed so I reinserted my ssd. I thought i could just select my boot device and then load into the windows installed on said device but when i tried to boot from my ssd it loaded windows 7.... (in windows 7 i see my ssd and i see the windows 10 files on it so no, i didnt install it on the ssd....)
    Next thing i tried was to use easybcd, so i tried adding my ssd as windows os to the boot list but when i restarted i got an error saying my winload.exe is corrupted.
    How do i fix this problem? I heared you have to install windows 7 first and than windows 10 for a dual boot gui so should i try to install windows 10 via the upgrade function on my ssd again?
    thanks in advance for helping me.
    Attached Thumbnails Attached Thumbnails Windows 10/7 Dualboot doesnt boot / error-wjqfeo2etoay_-uolw2m6w.png  
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  2. drpas's Avatar
    Posts : 10
    windows 10
    Thread Starter
       #2

    Edit: I cant use the upgrade option, since windows is already installed...
    Last edited by drpas; 22 Aug 2017 at 17:50.
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  3. Samuria's Avatar
    Posts : 6,041
    windows 10
       #3

    Welcome to the forum. You install the old o/s first as it may not understand new boot options. The screen shot from disk manager can you post it full size to we can see all the detail as it we cant see. Is this a MBR drive. The other problem disk manager not being in english I cant undersatand what it says
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  4. drpas's Avatar
    Posts : 10
    windows 10
    Thread Starter
       #4

    Samuria said:
    Welcome to the forum. You install the old o/s first as it may not understand new boot options. The screen shot from disk manager can you post it full size to we can see all the detail as it we cant see. Is this a MBR drive. The other problem disk manager not being in english I cant undersatand what it says
    The ssd is not an mbr drive (tried bootrec /RebuildBcd but i get Element not found error so i tried to set it to active and got "not an mbr..." error)
    I attached full size picture and if you cant read, i will try to install another language (might take some time because i dont have windows ultimate and my partition is full)
    Attached Thumbnails Attached Thumbnails Windows 10/7 Dualboot doesnt boot / error-5zvwpeopqle9fjzufqfthq.png  
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  5. Samuria's Avatar
    Posts : 6,041
    windows 10
       #5

    win 10 is using efui parition. Swap the disk around on the mother board so win10 drive is drive 0 make sure its set to boot that drive in the bios see if it boot win10 then. See if we can get that going first
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  6. drpas's Avatar
    Posts : 10
    windows 10
    Thread Starter
       #6

    Samuria said:
    win 10 is using efui parition. Swap the disk around on the mother board so win10 drive is drive 0 make sure its set to boot that drive in the bios see if it boot win10 then. See if we can get that going first
    Swapping the hardware or do something in the bios? Because swapping the hardware will be a problem (windows 10 = m.2 ssd and Windows 7 = Sata hdd ) Btw i think I know what the problem is, before I installed windows 7 the ssd was C (now its E) and the HDD was D (now its C)
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  7. Samuria's Avatar
    Posts : 6,041
    windows 10
       #7

    You ether need to try removing win 7 drive and see if 10 boots ok or set 10 to be first boot device in the bios we need to have 10 booting first step
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  8. drpas's Avatar
    Posts : 10
    windows 10
    Thread Starter
       #8

    Samuria said:
    You ether need to try removing win 7 drive and see if 10 boots ok or set 10 to be first boot device in the bios we need to have 10 booting first step
    I removed the windows 7 hdd and it said "Reboot and Select proper Boot device or inerst boot media in selected boot device and press a key" (I selected the ssd to boot)
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  9. Samuria's Avatar
    Posts : 6,041
    windows 10
       #9

    did it boot ok?
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  10. drpas's Avatar
    Posts : 10
    windows 10
    Thread Starter
       #10

    Samuria said:
    did it boot ok?
    no i got error: "Reboot and Select proper Boot device or inerst boot media in selected boot device and press a key"
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