What if I have a legally bought copy of WinXP and therefore have a"working" product key? What if I installed a copy of WinXP from my CD with my bought key and

What if I have a legally bought copy of WinXP and therefore have a"working" product key? What if I installed a copy of WinXP from my CD with my bought key and it doesn't activate because WGA servers are long offline? Same, but I use any WGA activation hacks? Same, but instead of MS copy I used "Delta Edition" distrib? And by the way, "working" in quotes because even if you have the key - the product key itself doesn't mean nothing except the way to allow installation process to succeed. It even doesn't guarantee what it would accuse you of pirating the said software (see WGA).