Windows 10: Dual Boot Windows 10 with Windows 7 or Windows 8  

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  1. Dude's Avatar
    Posts : 8,125
    Windows 10 Pro X64
       05 Oct 2014 #10

    Thanks Greg
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  2. Tews's Avatar
    Posts : 154
    Windows 10 Technical Preview x64
       05 Oct 2014 #11

    Hey Greg, Good to see you. We will need your expertiese to keep all of the newbs in line!!
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  3. Brink's Avatar
    Posts : 19,025
    64-bit Windows 10 Pro build 15063
       05 Oct 2014 #12

    Dude,

    I'm fixing to test this in a VM. Did you install W10 on an "unallocated" drive, or what it already formatted as E: ?
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  4. Dude's Avatar
    Posts : 8,125
    Windows 10 Pro X64
       05 Oct 2014 #13

    Brink said: View Post
    Dude,

    I'm fixing to test this in a VM. Did you install W10 on an "unallocated" drive, or what it already formatted as E: ?
    I clicked on my drive, but do not remember if it said unallocated. I just chose it, as it's the separate drive I put in for W10.
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  5. Dude's Avatar
    Posts : 8,125
    Windows 10 Pro X64
       05 Oct 2014 #14

    I just thought about this and checked, I do have the windows.old file as if I did an upgrade. So it seems that even though I canceled the install after mistakenly starting from the root folder, the cancel didn't change it.

    I suppose I could use disk management to remove the partitions it added, reformat the other drive and install again.
    Last edited by Dude; 05 Oct 2014 at 11:39.
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  6. Brink's Avatar
    Posts : 19,025
    64-bit Windows 10 Pro build 15063
       05 Oct 2014 #15

    Dude,

    Test complete. I did a dual boot with Windows 8.1 Pro (installed first) and Windows 10.


    Confirmed results:

    If you select to install Windows 10 on a formatted partition or drive with a drive letter when using step 5, then Windows 10 will show the same drive letter while in Windows 10 instead of the usual C: .

    If you select to install Windows 10 on an unallocated partition or drive at boot using step 4, then both Windows will show as C: when you startup in either one.



    I wouldn't worry about it unless you just wanted to wipe Windows 10 and start over using an unallocated drive to have C: .
    Last edited by Brink; 05 Oct 2014 at 12:12.
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  7. Dude's Avatar
    Posts : 8,125
    Windows 10 Pro X64
       05 Oct 2014 #16

    Thanks Shawn!
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  8. Brink's Avatar
    Posts : 19,025
    64-bit Windows 10 Pro build 15063
       05 Oct 2014 #17

    You're welcome.
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  9. Dude's Avatar
    Posts : 8,125
    Windows 10 Pro X64
       05 Oct 2014 #18

    All good now properly installed
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  10. Brink's Avatar
    Posts : 19,025
    64-bit Windows 10 Pro build 15063
       05 Oct 2014 #19

    Perfect.
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