Microsoft to pirates: No, you can't have Windows 10 for free

[Sarkar]

Myerson confirmed that users of bootlegged versions of Windows will be warned with a watermark and regularly asked to upgrade, a practice known as nagware.

http://www.businessinsider.com/microsoft-no-windows-10-for-pirates-2015-5?IR=T

 

[shawl_who]

nagware.. :hehe
I think its derived from d word nagging