Java runtime enviornment 7 build 51 64-bit (only available from 3rd party websites now) is highly suggested for proper execution. Ensure that the Technic Launcher has the Java settings set to 64-bit. Possible reasons for crashing include: not having enough cache memory, and not having enough RAM. If it freezes every 8 seconds, and eventually crashes, then the problem is a lack of cache memory. Shaders only work with newer-modeled Nvidia graphics cards. If you enter a game and everything is black except for the hotbar, then you have an incompatible graphics card. Simply delete the GLSL-shaders-mod from the 'mods' folder. Do not click on a carpender's door with an item. It will crash the game.