Hello, About a year ago i updated a few PC's for a small charity i work for with Windows 7 with Daz 2.2.2, clean install with all the updates installed nicely, will installing windows 10 through the update service/media creation tool be wise at this point, alot of posts on the internet/reddit, Recommend a clean install - daz - media tool(which i've done on my own machine), is there any reason it has to be a clean install?(These machines get used by teenagers but i keep them maintained) other questions: once upgraded through this method (7daz) is the windows 10 for life and just as Legit as anyone else that upgraded using a Legit W7 license? I've read they completely wipe your previous windows 7 key and that windows 10 free/upgraded version has no key? Any precautions or command prompt edits which will benefit me(i used the stop start up repair for windows 7)? Thankyou in advance, Cos.