Hi, have you tried to launch witcher2.exe (in the game folder) instead of launcher?
If the game starts, then I think you just have to install Microsoft Visual C++ Redistributable and then also the launcher will work.
If the game still won't launch, you can see if all the needed folders are in the right path:
here.
Last try: if you have MSI Afterburn installed on your PC, you can try turn it off before launching the game (or maybe is your antivirus blocking the execution of launcher?) :)