already found something. It is said that checking is only "for eyes" as Microsoft doesn't want to have situation like this: fight with piracy costs a lot, moreover a lot of people will be forced to refuse Windows. For Microsoft it is better to have 30% legal users, 68% not legal and 2% Linux users, but not 60% legal copies, 10% illegal copies (it's impossible to catch them all) and 30% of Linux users.
Moreover, I think that blocking security updates for illegal copies WILL CAUSE a big virus epidemic in the near future. Maybe I'm wrong but... And yes, I'm not very happy to use my "legal" Windows, but what can I do: I don't have money to buy it... It costs a lot... And I'm only student of high school.
It looks I'll be forced to downgrade to some kind of LINUX... :'(
Now guys you know about my pirate life....
PS. Did you know that Windows XP can keep your computer up-to-date automatically with the latest updates and enhancements? You can set Windows to recognize when you are online, search for downloads from the Windows Update Web site, and deliver them directly to your desktop. Genuine Windows validation is not required to use the Automatic Updates feature. (Found it in Windows website, and it's not very bad news for me...)