On July 29th, Microsoft launched Windows 10 (Threshold) and so far, Leo likes it, a lot. However, Leo says users shouldn't be in a rush to upgrade because it was launched early, and there will be another more polished version coming out in the Fall. So if you're not in a rush to upgrade, don't. Added features include a replacement for Internet Explorer called "Edge," and it's not really ready for prime time just yet, as some plugins like Last Pass don't work. So Microsoft also added Internet Explorer to continue to use. Ugh. Edge though, will be more done in the fall.
Most of the 14 million are doing a straight upgrade, but Leo says that a complete clean install is always best. But the jury is out how to actually do a clean install. So Steve Gibson says that once you do the upgrade, go into the control panel and reset it. That will, in essence, create a clean install.