Windows 10: Dual installation of Windows 7 and Windows 10

  1. Posts : 4
    Windows 10 Home 64bt
       02 Feb 2016 #1

    Dual installation of Windows 7 and Windows 10

    I used to belong to Windows XP Tweaks many years ago but this is my first here so hello everybody. This is not a problem just want some advice. I have just got a new computer with windows 10 installed on it. I have an installation disk for Windows 7 which I had on my old computer and also a spare external hard drive big enough for windows 7. Would I be able to just install the windows 7 on the spare hard drive.
      My ComputerSystem Spec

  2.    02 Feb 2016 #2

    1. Is it an OEM Windows 7 that came with the previous computer? If so then it would violate the EULA to install it on any computer other than the one it was first installed on. If it is a full retail Windows 7, did you actually remove it from the old computer? You have to do that before you can transfer it to a new computer without violating the EULA.

    2. There are special workarounds that have to be done to run Windows on an external drive. You would either have to install the spare hard drive as a second permanent hard drive in the computer, install Windows 7 on a second partition on a single installed hard drive, or run Windows 7 in a virtual machine inside Windows 10.
      My ComputerSystem Spec

  3. Posts : 407
    Windows 10 Pro x64, Windows 7 Ultimate x64 SP1, Windows 8.1 Pro x64
       02 Feb 2016 #3


    Windows 7 will not install and run on a typical External drive (USB). If it was an eSATA connected drive and the BIOS permits booting from it, it may.
      My ComputerSystem Spec

  4. Posts : 4
    Windows 10 Home 64bt
    Thread Starter
       02 Feb 2016 #4

    Thanks very much for your quick response. In fact I upgraded from xp to Windows 7 after purchasing the software so I have the disks I have also formatted the old computer and have to admit that Windows 7 is still on it so for now I think I will leave it as it is, I just wanted to use it for an EA golf game that will not run on windows 10.
      My ComputerSystem Spec

  5.    02 Feb 2016 #5

    pbcopter said: View Post

    Windows 7 will not install and run on a typical External drive (USB). If it was an eSATA connected drive and the BIOS permits booting from it, it may.
    It can be done using

    Best Windows To Go Creator to create portable Windows 10/8.1/8/7!

    but Windows 7 is not as easy to do as 8/10.
      My ComputerSystem Spec

  6.    02 Feb 2016 #6

    I have done this for Windows 8. But it should work for Windows 7 also. Note that you will need a key after 30 days.

    Windows 8 To Go - Setup on a USB Flash Drive or USB Disk
      My ComputerSystem Spec


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