Windows 8 and 8.1 Forums


Installing Windows 8 Pro in 64 bit mode on a XP Pro 32 bit

  1. #1


    Posts : 1
    Windows 8

    Installing Windows 8 Pro in 64 bit mode on a XP Pro 32 bit


    I down loaded W-8 Pro to a Windows XP Pro unit with 8 GB Ram and a E6300 2.8 GHz CPU (64 bit capable and Gigabyte EP45T - UD3 LD MB. I was hoping for the 64 bit install and got the 32 bit install. I was told that by using my 64 bit W-8 install disk I could upgrade to 64 bit, but can't. The XP system was 32 bit, but the CPU and MB should handle 64 bit. Since the system mode was 32 bit how to I get a 64 bit install?. The MS support technical contractor was no help.

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  2. #2


    Wynnum Australia
    Posts : 466
    Windows-10-Pro-Build-11099.rs1-x64


    You can't upgrade a 32-bit OS with a 64-bit OS. The only way out will be, to boot from your Windows-8-DVD / USB-Stick and do a clean installation.

    If you have trouble to get Windows-8 activated afterwards, then you can try this here:

    1.) Just install Windows-8 again over the already installed Windows-8 and activate it after

    or

    2.) Do the following:

    Change this registry key:

    HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE

    Change "MediaBootInstall" from "1" to "0"

    After doing that, typed "slmgr /rearm" (without the " ") into a command prompt (right-click, Run as Admin), wait for conformation prompt, restart your pc and activate Windows-8.



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      My System SpecsSystem Spec

  3. #3


    Quote Originally Posted by TONSCHUH View Post
    You can't upgrade a 32-bit OS with a 64-bit OS. The only way out will be, to boot from your Windows-8-DVD / USB-Stick and do a clean installation.

    If you have trouble to get Windows-8 activated afterwards, then you can try this here:

    1.) Just install Windows-8 again over the already installed Windows-8 and activate it after

    or

    2.) Do the following:

    Change this registry key:

    HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE

    Change "MediaBootInstall" from "1" to "0"

    After doing that, typed "slmgr /rearm" (without the " ") into a command prompt (right-click, Run as Admin), wait for conformation prompt, restart your pc and activate Windows-8.



    Uploaded with ImageShack.us

    Or you can do this:

    Clean Install with Windows 8 Upgrade
      My System SpecsSystem Spec

  4. #4


    Posts : 2,156
    Win7 Ult on DIY; Win8 Pro on MBP/Parallels; Win7 Ult on MBP/Boot Camp; Win7 Ult/Win8 Pro on HP


    Quote Originally Posted by steadyeddie2 View Post
    I down loaded W-8 Pro to a Windows XP Pro unit with 8 GB Ram and a E6300 2.8 GHz CPU (64 bit capable and Gigabyte EP45T - UD3 LD MB. I was hoping for the 64 bit install and got the 32 bit install. I was told that by using my 64 bit W-8 install disk I could upgrade to 64 bit, but can't. The XP system was 32 bit, but the CPU and MB should handle 64 bit. Since the system mode was 32 bit how to I get a 64 bit install?. The MS support technical contractor was no help.
    The Win8 upgrade link will not download a 64-bit OS to a computer running 32 bit regardless of having 64 bit capability. If you want 64 bit, then one alternative is to install a legal older 64-bit Win OS and download a new upgrade. Be sure and use the option of downloading the ISO so you can make an install DVD in place or later (or make a USB flash drive installer later). You also might consider purchasing and installing the 64-bit OEM Win8 System Builder version under the personal use license. While it may not sound like it, those in the know argue that anyone qualifies for using this version on one owned computer/installation at a time.
      My System SpecsSystem Spec

  5. #5


    Hafnarfjörður IS
    Posts : 4,376
    Linux Centos 7, W8.1, W7, W2K3 Server W10


    Hi there
    To see if you actually like Windows 8 first why don't you download the FREE trial of Windows 8 Enterprise 64 bit and install it as a Virtual machine on your XP system.

    Actually I see you already have a copy of W8 x-64 -- so install that as a VM first to see if you like it and if the programs you need from XP will still run.

    A 32 Bit HOST OS CAN RUN A 64 BIT GUEST Virtual Machine provided you enable the virtualisation VT feature in the BIOS (it's usually automatically enabled in modern machines now).

    Use free VMware vmplayer or oracle's free VBOX for creating your virtual machine -- even the X-64 W8 Enterprise will run quite nicely on a 1GB virtual machine !!. 2GB is better of course or even more -- but your XP host is of course limited to 4GB anyway.

    Then if you don't like W8 you can upgrade to W7 -- although again for installing a 64 bit version when your original OS is a 32 bit one you'll have to do a Fresh install.

    In any case before doing ANYTHING backup your XP system so if things go pear shaped you can recover your old system while working on solutions.


    Cheers
    jimbo
      My System SpecsSystem Spec

  6. #6


    Posts : 12
    Windows 8 Ent


    I never do an upgrade, I learned from experience.
    The MS drivers are tuned for speed and stability, but their lawyers rule the roost since Bill left, so their drivers are always crippled as to not infringe on anything that might make money down the rode. Thus hobbled audio and no UAC2 support...
    If they don't include UAC2 support 8 will fail miserably. They underestimate the global consciousness.
    As do all machines.
    Multi channel audio recordings are going to be the big thing again, I think they are missing the point again.
    You can create multi channel audio and completely avoid patent infringements.
    Perhaps it's an expertise problem?

    pear shaped...hahahaha! cheers!
    There is only like 3% of the people in the world that even understand that joke.
      My System SpecsSystem Spec

  7. #7


    Portsmouth Hants
    Posts : 772
    Windows 8.1 Pro with Media Center


    If you have a willing friend with a 64-bit Windows system, on their PC you could re-download the upgrade as the 64-bit version, and then burn a dvd or flash installation medium.

    How to redownload your Windows 8 Upgrade setup D/L.
      My System SpecsSystem Spec

Installing Windows 8 Pro in 64 bit mode on a XP Pro 32 bit
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