Okay im saying this only because it's christmas and im in a very good mood for couple reasons.
If there is a real problem behind the trolling regarding playing the game, you have many options:
1. Try to reinstall the game
2. Download the patches for the game (Fixes many stability, gameplay and other problems)
If Witcher 2 Launcher doesnt download them automatically, you can download them from
this website's support section.
3. If the game still doesnt work, go to the store from where you bought the game (if you
bought it from the amazing internetz, im sure the nearest electronics store will do the
trick) and have them check if there's something wrong with the game, your computer or
your system specs.
4. Stop being rude and a troll, tell us your specs and define your problem properly (when
the problem occurs, what have you tried to solve it etc.). Then MAYBE here is someone
who didnt get pissed about your trolling and can help you.
Also you stated in your first post that WoW and Skyrim run without lag on your comp.
That's because they demand less from computer system than Witcher 2. You can't assume that because you can play almost brand-new Skyrim, you could play a half year old Witcher 2, too. I mean you cant play 4-year-old Crysis with ultra settings either, hardly any system can.
May you have merry Christmas and a happy new year
P.S And also, that you dont get anything to troll about my grammar, i speak Finnish as my mother tongue and i do not yet have learned English perfectly.