I'm not a lawyer, but I have the feeling that all nalagama Microsoft restrictions (e.g. the imposition of use to me I sold Windows only on one laptop) is illegal in the Russian Federation and contradict the Civil Code. Accordingly, if you are not lazy, if anything, to defend their case in court — use it. Another issue is that when you travel abroad can cause problems, because it has its own laws.
Not willing to give references to specific articles of the civil code, but been wanting to update your knowledge about this and to write a short article.
In General, I eventually installed Ubuntu (after being a user of Windows since version 3.0 in 1991) — and forgot all of these licenses as a nightmare.