Services.msc
I'm a fair fan of Windows - I think without Bill Gates personal computing wouldn't have reached the levels we're at now.
But... to those who say "accident" I retort thus - someone ***wrote a module*** specifically designed to slurp all this personal data. The inclusion of the module may have been an accident (hmmm.... right... "Review team, has anyone noticed this module right here? Do you think it's ok? Ok then...") but its deliberate writing wasn't. Scummy.
No doubt most people will know how to disable it, but for those who don't - start menu, type services.msc, find the service, properties, disable.
My level of trust is now so low that I've restarted my laptop to make sure they aren't re-enabling it by default. They aren't.