Does the GraphicsDriverUpdater.exe utility in the C2 install folder help? It at least directs you to the graphics card's manufactures site to find a newer driver, if it exists. Fore example, The latest amd driver I can get that works for my card is 5 years old.
If it crashes in the editor when opening a webgl capx then the "bug" is your graphics card can't handle shaders or something? I can use most effects in the editor except for a few of the more involved ones, which do crash the editor. But no doubt it's due to graphics card limits in my case.
There is a project property "preview effects" to turn off the preview in the editor. capx files are just zip files that you can extract to a folder and you can change the setting in the .caproj file.