I have two Windows based laptops running Windows 10. Recently the older PC crashed at a morning boot up and the repair portion could not fix the problem. Luckily I had recently created a Recovery Drive on a new flash drive. I used it to do a full recovery. I was shocked to find that it had recovered to Windows 8. This PC came with Windows 7. I had upgraded it to 8, and later to 10. My second 10 PC was about one week old. In theory I hoped that a recovery drive from the new PC might be usable to recover the older laptop. I did some research on using a substitute recovery drive. The answers I found varied widely from no, yes, you need special software, to you have to buy a copy of Windows 10. My question is can this be done and how? Tnx