This is my opinion and may have some merit. The two desktop PC's I have and the wife with her Dell laptop have been upgraded to Windows 10... One of mine is with WIN 10 Pro. There's not a day go by that we have some type of issues with the new upgrade. If it's not security issues, software issues, or just plain old problems that we didn't have with Windows 7. It would have been best for Microsoft to have waited and just sent each PC owner a new Windows 10 disc and did a clean install. I'm seriously considering ordering three Windows 10 disc from someone and do this to our computers to see if that cures the ills on these WIN 10 upgrades.