win10 upgrade and rollback and upgrade

I had some problems upgrading to win10. I thought I would write down my experiences as I dont think I will be the only one 🙂

I had win8 on my personal laptop, so I decided to take advantage of the free upgrade offer to win10. I have a tool rmprepusb that allows you to boot the image off of a usb. As the iso for win10 is large, I decided to go that way and download it to the usb key, so I would have a way to do the upgrade on other computers.

Problem was that, even though I used the usb key and selected upgrade, it did not do an upgrade to win10, but instead did a new install. This meant that my license key was lost (forever?) and I was now in win10 without a license.

Luckily win10 comes with a rollback feature. Unluckily that did not work for me.

Dont panic.

The trick here is to look into c: drive and rename the windows.old directory. I then reinstalled a virgin win8 with a license key. Once I had that in place, I used my usb key to reboot and get a dos prompt and renamed the existing windows directory to windows.8new and copied the windows.old directory to be windows. Then rebooted into the machine again – and it all seemed to work ok (even had all my programs on the start menu, etc).

I then did the upgrade option for win10 (as I should have done right from the beginning).

I now have a legit license for win10.