1.    28 Aug 2016 #1
    Join Date : Aug 2016
    Posts : 3
    Windows 10 Professional 64 bit

    What happens with my Win10 license if I go back to Win7 for a day?

    As per title.

    I've upgraded my Win7Pro to Win10 Professional a few months ago. I want to install Win7 back for testing purposes. I still have my Win7 activation key.

    What's going to happen after the testing when I'll install Win10 again? Will it be activated or will I have to pay?
      My System SpecsSystem Spec

  2.    28 Aug 2016 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 5,803
    Win 10 Pro (1607)

    Hi, your PC should automatically activate if you reinstall Win 10. Once activated, your right to Win 10 is held on MS's activation servers against your hardware.

    I suggest you do the following to save a lot of time:
    a. Create a disk image using e.g. Macrium reflect (free) + its boot medium + external storage (Use 'Windows Backup'). You can then restore your PC exactly as was with Win10 in under an hour. (Everyone should use disk imaging routinely anyway- strongly recommended here).
    b. Reinstall Win 7 and do what you need to
    c. Create an image of that so you can restore Win 7 any time you wish in under an hour.
    d. Restore your image of Win 10.

    Note: you will need to be careful about partitions on your disk - best to delete the Win 10 ones then install Win 7, then delete Win 7 ones and restore Win 10.

    And a much easier way is to get a spare disk, put that in, and install Win 7 on that.. no messing, almost no risk.
    Last edited by dalchina; 29 Aug 2016 at 00:16.
      My System SpecsSystem Spec

  3.    28 Aug 2016 #3
    Join Date : Jan 2014
    Posts : 913
    Windows 8.1, 10

    Depending what you want to test, you might also be able to use one of the free Virtual Machines which Microsoft provide for browser testing. You'd need something to host them, but if you have Win 10 Pro you should have Hyper-V already.

    But the above advice about taking a backup image is still good whatever you do - you never know when a backup image might be needed...
      My System SpecsSystem Spec


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