Will a Windows 7 32-bit product key work with Windows 7 64-bit?

Stephen November 9, 2011

My brother has a 64-bit capable system running 32-bit Windows 7. I have the 64-bit upgrade disk from upgrading my own system. If I use it to upgrade his system as well, will he still be able to register using his 32-bit Windows 7 product key?

  1. Mike
    November 10, 2011 at 7:25 pm

    It depends on whether it's an Retail or an OEM/System Builder licence.
    Retail Product Keys work for both, 32bit and 64bit
    OEM/System Builder Keys work for only the licensed one, 32bit or 64bit.

    Also your upgrade DVD must be of the same edition as his key!
    For example if your upgrade disk is for Windows 7 Ultimate but his key is for the Home Premium edition the key won't work.

  2. Anonymous
    November 10, 2011 at 7:59 am

    If its a new copy of windows never installed, Yes, it is valid for either 32 or 64 bit, its up to you which architecture you want to use. Please note 1 key, 1 license. You can't install 32 bit one computer and install 64 bit on another computer using the same key.

    The retail packages of Windows 7 come with both 64-bit and 32-bit installation disks with the same product key

    if you already have 32bits installed and you want to upgrade to 64bits then the key will not work.

    • James Bruce
      November 10, 2011 at 10:23 am

      A fantastically thorough explanation, thanks!

  3. Jeff Fabish
    November 10, 2011 at 3:39 am

    Hi Stephen,

    The key will not work because you can only upgrade to the same architecture (i.e 32 bit to 32 bit). 

    - Jeff