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Dual boot 8.1 / 10 on Surface Pro 3

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schmorblatz
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2015/08/01 06:33:11 (permalink)
I'm currently backing up my Surface Pro 3 (i7/512GB, work computer). Then, I will do a factory reset, install KB3055583, install Windows 10 upgrade, and then download Windows 10 ISO.
 
I want to try dual booting 8.1/10, using previously created W8.1 usb stick and the newly created W10 one. (I will probably have to play with PE diskpart commands)
 
I am wondering if dual booting 8.1/10 is legitimate : will the two OSes be considered as genuine and activated ? I did'nt find information. The only information that can be found is about beta and preview versions.
 
Do you know what appens to the licence when upgrading ?

why make it simple when it can be complicated ????
 
rig 1 : Asus P9X79-E WS / i7 4930k / 3-way SLI EVGA 780ti / Quadro K2000 / watercooled / 3D Vision Surround / 3 x Samsung 2233RZ + HP ZR22W
rig 2 : Asus P9X79 WS / i7 4930k / 2-way SLI 770 / aircooled / 3D Vision / Samsung 2233RZ + Samsung 2232BW + HP ZR22W
rig 3, 4 5, etc. : uninteresting !
#1

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    rjohnson11
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    Re: Dual boot 8.1 / 10 on Surface Pro 3 2015/08/01 06:43:11 (permalink)
    Make a full backup and then install Windows 10 rather than try the old dual boot routine. If you are not happy with Windows 10 then restore your backup.

    AMD Ryzen 9 7950X,  Corsair Mp700 Pro M.2, 64GB Corsair Dominator Titanium DDR5  X670E Steel Legend, MSI RTX 4090 Associate Code: H5U80QBH6BH0AXF. I am NOT an employee of EVGA

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    schmorblatz
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    Re: Dual boot 8.1 / 10 on Surface Pro 3 2015/08/01 08:45:34 (permalink)
    The problem is that I can't restore while working ! The tablet PC must be ready monday. So, I'd like to simply be able to reboot and get a usable environment in case I run into problems (I use officialy incompatible pro app I had to hack in order to get it to work under 8 64bit).
     
    Could'nt live without multiboot (since WinNT 3.1) ! In the worst case, I will have to use the backup tablet (an old HP TC4400), and to phone MS... No guts no glory.
     
    Will keep you informed.
     
     
    post edited by schmorblatz - 2015/08/04 06:37:43

    why make it simple when it can be complicated ????
     
    rig 1 : Asus P9X79-E WS / i7 4930k / 3-way SLI EVGA 780ti / Quadro K2000 / watercooled / 3D Vision Surround / 3 x Samsung 2233RZ + HP ZR22W
    rig 2 : Asus P9X79 WS / i7 4930k / 2-way SLI 770 / aircooled / 3D Vision / Samsung 2233RZ + Samsung 2232BW + HP ZR22W
    rig 3, 4 5, etc. : uninteresting !
    #3
    schmorblatz
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    Re: Dual boot 8.1 / 10 on Surface Pro 3 2015/08/03 09:21:25 (permalink)
    Update :
     
    I first tried installing 8.1 (got activated) tried, then 10 : no way, 10 does'nt get activated as it asks for a key (no key for Surface).
     
    [EDIT] : secure boot must be disabled !
     
    Then, bare metal restore of 8.1 (reset to factory using a USB stick). Got activated. Installed 10 update (ISO, setup.exe - not boot time). Win 10 got activated. I shrinked partition in order to make room for 8.1.
     
    At this point, one system : activated OEM Win10.
     
    Using Win8.1 ISO, I installed 8.1 on the remaining disk space. It did'nt ask for a serial. In Windows Update, I disabled firmaware update. Why a firmware update ??? Windows 8.1 was also automatically activated.
     
    At this time, I am dual booting an activated 8.1 and an activated 10 on the same Surface Pro 3.
     
    It rocks ! But if something happens that ask me to make a choice, it will be 8.1. Not 10.
     
    Because of this, for example :
     
    https://www.youtube.com/watch?v=x3pCPnGPUtY
     
    post edited by schmorblatz - 2015/08/04 06:38:20

    why make it simple when it can be complicated ????
     
    rig 1 : Asus P9X79-E WS / i7 4930k / 3-way SLI EVGA 780ti / Quadro K2000 / watercooled / 3D Vision Surround / 3 x Samsung 2233RZ + HP ZR22W
    rig 2 : Asus P9X79 WS / i7 4930k / 2-way SLI 770 / aircooled / 3D Vision / Samsung 2233RZ + Samsung 2232BW + HP ZR22W
    rig 3, 4 5, etc. : uninteresting !
    #4
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