If you run Software mode, the game crashes as you have noticed. From the main menu of Half-Life or ESF, click on Configuration --> Video --> Video Modes and select OpenGL, and a screen resolution that your computer can best handle.
He if you put it in OpenGL you need a driver to where can you download that i had that problem to but i put cl_fxquality "0" in the config.cfg file.( it is located in the ESF folder.
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