Everyone has a Windows upgrade horror story. For me, it was an XP installation that inexplicably crashed halfway through the upgrade process, somehow corrupting my hard drive at the same time. And with Windows 10 launching on July 29th, it's hard to avoid the traumatic flashbacks to past Windows releases. But fret not. Windows 10, it turns out, offers the smoothest Windows upgrade process ever. It's remarkable for just how unremarkable the entire endeavor actually is. Still, there are a few things you should know before taking the plunge.

http://www.engadget.com/2015/07/27/w...0-upgrade-faq/