|Do you have an internet connection? It might be that Games Explorer is checking for game updates and information. When there's no internet connection and you try to launch the game, nothing happens and sometimes you may find out that "explorer.exe" or "rundll32.exe" using 50% of CPU or even 100% if you have a single-core CPU.|
Try disabling Games Explorer to collect information and updates.
E8500 | 4GB | 320GB | 9800 GT 1GB @ 720/990 | HP w1907 @ 1440 x 900 60Hz| Win7 Ultimate x64