This post is non-genuine
Haha, how nice of Microsoft to let me know if my copy of Windows if 'genuine' or not. Hmm, let's check our dictionary for a word that might fit what they mean by 'genuine' or 'non-genuine'.
From dictionary.com......
eu·phe·mism Audio pronunciation of "euphemism" ( P ) Pronunciation Key (yf-mzm)
n.
The act or an example of substituting a mild, indirect, or vague term for one considered harsh, blunt, or offensive: “Euphemisms such as ‘slumber room’... abound in the funeral business”
I would say that fits.