By nagging the end-user, to no end, to install Windows 10. My brother is not PC illiterate, but he had to call me to put a stop to the intrusive Windows 10 popup, etc. That is called intrusiveness in my book, and my brother certainly agreed as much. Worse yet, is the attempt by Microsoft (in my opinion) to create a product that more-resembles smart phone software than a Windows product - including loss of privacy, and making it harder to protect ones data (from Microsoft). Last, but not least, is the forced updates policy regarding the free version of Windows 10. There is *no* way to opt out of this that I know of - unless someone has found a hack for it. Now, I like Windows, and I'll have to install 10, someday, if I want to stay fully secure, but in the mean time, I hope that there will be enough backlash to force Microsoft get back to the basics and respect our privacy/freedoms. Either that, or maybe some other company will introduce a user-friendly Windows alternative that I can switch to.