Windows 8 and 8.1 Forums


Upgrading to 64 bit Windows 8.1 from 32 bit Windows 7

  1. #1


    Posts : 2
    Windows 7 Professional 32 bit

    Upgrading to 64 bit Windows 8.1 from 32 bit Windows 7


    Okay so here's my question,
    I have the product key and downloadable .iso file for Windows 7 (32 bit), however I want to have a 64 bit operating system to take advantage of new computers hardware and such. I'm going to be building the computer and obviously need an operating system.
    Is my best bet to install my copy of Window 7 (32 bit), then purchase the 64 bit version of Windows 8.1 on a 64 bit computer I have access to?
    Orrrr can I go ahead and buy the Windows 8.1 (64 bit) upgrade on a 64 bit computer and use THAT .iso to boot my computer once it's built? This would be nice as I could skip the step of having to install Windows 7 first.
    If my wording is poor or you need more explanation please let me know, I'm pretty confused about the whole process.
    Thanks for the help.

    Also if you couldn't tell my computer won't have an optical drive.

      My System SpecsSystem Spec

  2. #2


    USA
    Posts : 689
    Windows 8.1 Pro with Media Center


    My question would be why in the world would you want to get to a 32-bit OS... even if it is Windows 7???

    Not really quite sure what you want to do... but whichever way you go... either or both OS's should be 64-bit.

    Bottom line is you'll have to choose either a 32 or 64-bit OS as you can't mix and match. If you install a 32-bit OS and later want to install a 64-bit OS, you'll need to do a clean install. The same goes if you went the other way.

    Good luck in your decision
      My System SpecsSystem Spec

  3. #3


    Posts : 2
    Windows 7 Professional 32 bit


    The 32 bit version of windows is from my old laptop. I'm building a new desktop this week and am trying to figure out the best way to get a 64 bit version of Windows on it.

    From my understanding the license that I have for Windows 7 is stuck as 32 bit...
      My System SpecsSystem Spec

  4. #4


    Posts : 879
    Windows 10


    Quote Originally Posted by jbr003 View Post
    Or can I go ahead and buy the Windows 8.1 (64 bit) upgrade on a 64 bit computer and use THAT .iso to boot my computer once it's built?
    Yes. edit: The computer must be Windows 7/8/8.1 64-bit.

    If you buy a Windows 8.1 product key, you can perform a clean Windows 8.1 installation on your computer.

    Windows 8.1 - Wikipedia, the free encyclopedia

    New retail installation media of Windows 8.1 were released alongside the online upgrade. Unlike their Windows 8 counterparts, they can install Windows on computers that do not have an operating system at all. Microsoft stated that the change was in response to customer feedback, and to allow more flexibility for users. Pricing for the retail copies of 8.1 remained the same.
    Download the Windows 8.1 installer from Microsoft's web site and create a USB flash drive (Install by creating media > Next > USB flash drive).

    Here is info about Legacy BIOS Boot Mode (installing using the MBR partition style) and UEFI Boot Mode (installing using the GPT partition style): LINK
    Last edited by genet; 02 Sep 2014 at 15:07.
      My System SpecsSystem Spec

  5. #5


    Welcome to Windows Eight Forums, jbr003.

    Even if you upgrade 7 to 8 32bit, you can't download or get a 64bit ISO, so you may as well fork the money out for the latest 8.1 install discs that would also include Update 1.

    Windows 8 and Windows 8.1 ISO - Download or Create

    You also might consider waiting for the Windows 9 preview coming out at the end of the month. There could possibly be a free final release going that route. One never knows.

    Dual booting your 7 with 9 preview is another choice. Final release of 9 is forecasted for Spring 2015. It'd be a shame to pay for 8.1 now with 9 on the horizon.

    Good luck with whatever you choose and again welcome.
      My System SpecsSystem Spec

  6. #6


    USA
    Posts : 689
    Windows 8.1 Pro with Media Center


    Quote Originally Posted by jbr003 View Post
    The 32 bit version of windows is from my old laptop. I'm building a new desktop this week and am trying to figure out the best way to get a 64 bit version of Windows on it.

    From my understanding the license that I have for Windows 7 is stuck as 32 bit...
    You should be able to download the 64-bit version of the ISO file and use the same activation code... provided you have a valid activation (PID) code, and use the same OS edition. For example - if you have say Windows 7 Home 32-bit, then your activation code will only be for Windows 7 Home edition, whether 32 or 64 bit.

    Again, no matter which way you go, you'd be better off with a 64-bit OS, especially where RAM is concerned. Example - say you currently have 8 gig of RAM in your system, but moving to a 32-bit OS, you're effectively throwing away 4 gig of RAM since a 32-bit OS is restricted to just 4 gig of RAM.

    So yeah, why would you want to go to a 32-bit OS, when a 64-bit OS is better and more efficient. That's my point.

    Good luck.
      My System SpecsSystem Spec

  7. #7


    Posts : 879
    Windows 10


    edit:

    Create installation media for Windows 8.1

    Take a look at this post: link
    Last edited by genet; 10 Nov 2014 at 16:45.
      My System SpecsSystem Spec

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