Disallowing security updates to run on non-genuine copies of Windows is not exactly in Microsoft's best interest.
After push back YEARS ago, Microsoft allowed security updates for non-genuine users. No "feature feature improvement" type downloads though.
Interestingly, with Windows 7 at least, OEM-SLP loader method of "piracy" has remained bullet-proof. In the past 5 years it's been in use, it has always reported genuine, no altering MS binaries, and MS can't tell the difference between you and someone that bought their HP PC at Best buy.
So far with Win 8.x phony KMS servers has made it indistinguishable from a computer activating on a company's LAN.
XP you could just harvest VL keys from university and workplaces attended.
There are clean ways to "pirate" any MS OS, starting with a clean genuine install ISO, yet people end up with junky malware filled garbage.
In any case even if you get a free upgrade on this "genuine" pirated copy, I would expect to remain genuine, but not be able to call in for tech support, etc.