Pencil is a free, open-source sketch mapping and GUI prototyping tool from Vietnam. Its hand-painted style can match the effect of drawing on paper veritably, and can independently run on Windows, Linux and Mac OS platforms or even installed as plugin of Firefox.
If you are a player, especially a guy being fond of PC games, then you must have met the situations of some games can't run normally or they run with all sorts of strange problems. At this time, you only need to make sure your Windows has installed the following system components (or being called running environment is more suitable), then you will be able to pass unimpededly in the game world! Of course, the correct version is also critical.