Hi luizelias,
Although we cannot be certain, an upgraded video card is very likely to help you out. Especially if you get past the Launcher and into the actual editor, since you would probably find it very difficult to use with your current hardware.
Here is some information for hardware that we recommend to develop with:
Out of curiosity, you may want to try running the Launcher in OpenGL mode to see if that bypasses the crash. You can do this by right-clicking the desktop shortcut, choosing Properties, and at the very end of the Target path, adding: -opengl
Let us know the results if you try this.