This guide will explain exactly what OpenGL 2.1 is, how to check your current version, and—most importantly—where to find the correct, stable driver for your specific Intel GPU.
: As a last resort for apps that require OpenGL 2.1 on unsupported hardware, you can use a software-based renderer like Mesa , though this will be much slower as it uses your CPU instead of your GPU. opengl 2.1 download windows 7 64 bit intel