One thing that I learned today...even though all those stickers on a laptop are ugly and annoying, just leave them on. Most importantly, never remove a Windows authenticity sticker, apparently it's worth a lot of money, like 120 euro. Seems like I could've gotten a lot more out of my old laptop if I had just left it on, because it did have a perfectly fine genuine Windows Vista.
Ah well, at least I know that now.