To understand why you can’t just "download OpenGL," you have to understand what it is. OpenGL (Open Graphics Library) is not a program like Microsoft Word or a game. It is an API (Application Programming Interface). In simple terms, it is a set of rules and instructions that allows software (like games) to talk to your hardware (your graphics card).
: On older Windows 7 systems, using the "Classic" desktop theme can sometimes disable OpenGL; switching to a Windows Aero theme may resolve this. Microsoft Learn Verifying Your Version opengl 2.0 download windows 7 64 bit filehippo
Since OpenGL 2.0 comes from your GPU drivers, follow this step-by-step guide. To understand why you can’t just "download OpenGL,"