Why Your Windows PC Isn’t Genuine (and Exactly How That Limits You)
 

Microsoft recently announced that WIndows 10 would be a free upgrade even for computers without genuine copies of Windows. But, even though they’ll let you install Windows 10, you’ll just end up with a non-genuine copy of Windows 10 that continues to nag at you.

http://www.howtogeek.com/212956/why-...at-limits-you/