Windows 7 64-bit was released in 2009. OpenGL 4.4 was announced in July 2013. While Windows 7 is an older OS, it fully supports OpenGL 4.4 .
Summary
You cannot download OpenGL 4.4 directly as a standalone software package. OpenGL is a graphics API that comes as part of your graphics driver. opengl 4.4 download windows 7 64 bit
OpenGL 4.4 cannot be downloaded as a standalone program because it is bundled directly within your graphics card drivers Windows 7 64-bit was released in 2009