I've been trying to understand all this but simple information is hard to find. Does anybody know if Intel Celeron B820 supports Opengl3.3? I need it to run the latest Blender.

I thought OpenGL support is GPU-dependent.
"OpenGL (Open Graphics Library[3]) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering."

But I found this:

Notes on Intel Celeron B820
The CPU is compatible with Shader Model 4.1, along with DirectX 10.1 and OpenGL 3.1 APIs. OpenCL API is not supported.

http://www.cpu-world.com/CPUs/Celeron_D ... 0B820.html

No idea about your Celeron CPU, but I did just download the latest Blender v2.83.4 (Linux) on my i7 CPU system with no GPU and it seems to run fine for now anyway...

Yeah, it seems to be a Windows problem. All the sources say to update your graphics driver but the app I downloaded from Intel told me there were no available updates. I might not be able to run new versions of Blender sadly.

Try using "OpenGL Extensions Viewer 6" The program will give you a lot of info about your GPU's abilities.

https://realtech-vr.com/home/glview

It still allows you to render using CPU with "Cycles" render engine. You should also be able to use "Evee" render engine too.

Thanks Bilbo - I'll give that a shot.

Thanks Racer but the problem is, Blender won't even open because of this so I can't use it at all.

I ran the GLView tool and it is just as Nidhogg pointed out - my card supports 3.1 whereas Blender uses 3.3.

YAAAAAY! Some bright spark on Blender Artists Community has a script to make it work.

https://blenderartists.org/t/trying-to-get-blender-2-8-to-run-on-my-old-laptop/1135704

Great, now all you have to do is learn the 2.8 interface. I read that link and is says it will run very slow using that script. Good luck.

Thanks. In case it is too slow to be useable, I have downloaded Virtualbox to run Linux. Apparently Linux drivers are more up to date with regards OpenGL than Windoze.

I do the reverse. I run Linux and have a Win10 VM just for the handful of Windows only programs I occasionally use a couple times a year or so. Really I don't need Windows at all, but there are a couple of programs that I don't want to give up. Yes I can run them under Wine (the windows emulator not the drink), but I don't like Wine.