I've done it successfully to many of my customers. A teacher in computing had heard rumours similar to what MrRipley said and asked for my comments.
About deleting user profiles, I believe people get confused at the first boot after the updade which I haven't seen documented well in the Internet: You will be asked to log in with your Microsoft account. If you have been using a local account (like most guides other than Microsoft recommend) you may think your account has been deleted and you'd have to start using the M$ account. You don't have to! The way to get to your previously used account is highly misleading, but the route is very simple to follow: Just click on the link where it says "Create a MS account" and a form with many boxes for your data will open. DON'T fill in any of it! Instead, navigate to the bottom of the page where you should find a small font violet text over the dark purple background saying something like "I want to use my previous account" and click that. You're done! Note, there's no underlining to mark any hyperlink, only a short sentence written in a colour with minimum contrast to the background.
