Ronnie Poole

Why does the Dell Vostro V13 notebook I bought off of Craigslist tell me my version of Windows 7 is not genuine?

27 Feb 2013
Windows 7
Explorer 9
27 Feb 2013 | Windows 7 | Explorer 9

And I am afraid to go to the Microsoft website to find out why and register out of fear of the UNKNOWN. What and why is my OS not genuine, can anyone tell me how to resolve this issue?