Dual Boot Win7 after the Win10 Upgrade


  1. Posts : 74
    Win 10 Home
       #1

    Dual Boot Win7 after the Win10 Upgrade


    Just wondering if this can be done or would I be opening a can of worms.

    I recently did the Win7 to Win10 upgrade. All is fine. The Win7 was OEM and I have the 4 OEM disks that came with the PC. Is it possible now to reinstall Win7 on a new partition on my C drive, using the OEM disks so that I would have a dual boot set up?
      My Computer


  2. Posts : 17,371
    Windows 11 Pro
       #2

    It's easy to dual boot with Windows 7, but not with the OEM disk set because they will want to wipe the hard drive and start over. Also, you only have 1 license for Windows. Dual booting Windows 7 and Windows 10 requires 2 licenses for Windows. What you would have to do, after you purchase a second license for Windows, is restore the computer to factory Windows 7 with the OEM disks. Shrink the Windows 7 partition to allow room for Windows 10. Do a clean install of Windows 10 to the space you created for it.
      My Computer


  3. Posts : 74
    Win 10 Home
    Thread Starter
       #3

    Yes, now that you mention it, every time when I have had to do a reinstalltion of Win7 in the past using the OEM disks, it always starts with a format of the C drive which of course wipes it clean. I do have a copy of Win10 Full Version so that would be my second license. If in the future I get myself into a predicament that I can't resolve and have to re-format the C drive, installing Win7 first from the OEM disks and then Win10 from the DVD on a new partition would give me a dual boot set up. Would you agree?
      My Computer


  4. Posts : 17,371
    Windows 11 Pro
       #4

    miata54 said:
    installing Win7 first from the OEM disks and then Win10 from the DVD on a new partition would give me a dual boot set up. Would you agree?
    Yes.

    Separately.... If the computer has a Windows 7 OEM sticker on it with a product key for Windows 7 printed on it, you can get a generic Windows 7 ISO file from here:
    Microsoft Windows and Office ISO Download Tool

    that would allow you to install Windows 7 to an empty partition, activate it with the product key from the COA sticker, and set up dual booting.
      My Computer


  5. Posts : 74
    Win 10 Home
    Thread Starter
       #5

    Yes, it has the sticker with a product key. Thanks for the link on a generic Win7 ISO. Using this ISO, wouldn't I also need drivers for the PC that are included on the OEM disks?

    Update: The downloaded Win7 ISO is in zipped format. Should I unzip it before burning it to a DVD or just leave it zipped?
    Last edited by miata54; 09 Dec 2017 at 11:11.
      My Computer


  6. Posts : 17,371
    Windows 11 Pro
       #6

    Most computer manufacturers' websites have drivers for download. The important one is to get connected to the internet, Windows Update may then find drivers for other hardware. I would suggest you go to the manufacturer website and at a minimum download the network adapter drivers and save them to a USB flash drive or other external storage location.
      My Computer


  7. Posts : 2,829
    Windows 10 Pro X64
       #7

    Hi,

    Update: The downloaded Win7 ISO is in zipped format. Should I unzip it before burning it to a DVD or just leave it zipped?
    Yes, you should. Otherwise there won't be much you can do with that DVD. Set your burning software so it makes a bootable DVD.

    Cheers,
      My Computers


 

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