A recent update to everyone’s XP validated their install to make sure that their copy was genuine. Well it now turns out that a user of Windows is sueing Microsoft because of this.
Id like to see how far he gets
Screenshot once it finds out its not real: 
Lawsuit calls Microsoft’s anti-piracy tool spyware
A computer user is suing Microsoft Corp. over the company’s Windows Genuine Advantage anti-piracy tool, alleging that it violates laws against spyware