Downgrading the OpenGL Support on Intel HD Graphics 520 ?

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Downgrading the OpenGL Support on Intel HD Graphics 520 ?

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Hi all, how to downgrade the graphics drivers version (Graphics Control Panel shows actually 21.20.16.4590) of my brandnew laptop, so it then supports OpenGL 4.2 (or lower) version instead of the installed OpenGL 4.4

It is a Dell inspiron 5559 Signature Edition, Intel i5-6200 U CPU, Intel HD Graphics 520, OS Windows 10.

I want the laptop to perform GLSL shaders that I've designed previously on a Lenovo laptop that had a dedicated AMD Radeon R5 Graphics card, supporting OpenGL 4.2. My shaders are using built-in variables that have been deprecated in OpenGL 4.4. I received for example ERROR messages telling that gl_ModelViewMatrix, gl_Vertex, gl_Normalmatrix and gl_Normal are not available in current GLSL version.

I've tried writing the version directive: #version 420. Doesn't work.

Thanks in advance for any solution.

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