There is some usability issues with a fresh W7 install, but they're quickly amended. I have no idea why they continued 10 with how 8 was. Windows 10 isn't inherently bad, it's just poorly conceived. There's a fine line between what customers want and what a company thinks customers want. One of the things I didn't like about W7 was the Superbar. Which is heavily OSX inspired since Microsoft and Apple share ideas often as a result of their past court dealings. It works for some, but it's not terribly useful for me. A lot of issues result with the upgrade process, but I've had issues on a drive I'll sometimes turn on and boot from to see what's new with W10. A clean install will fix or address a lot of issues, but due to the OS getting near complete updates and refreshes, it puts a lot of work into component manufacturers and OEMs to constantly develop new drivers because Micrisoft just fudged their drivers that are now incompatible because a dev in Redmond decided to move a few zeros over to improve performance by a fifth of a percent.