Crash of the PC while working with Rhino

When I was rendering a big file (300MB) the PC(32MB RAM and shared memory for the graphics) hangs. How Can I render the file without Crashing the PC? Thank you in advance

We need a little more information. Rendering with what? Rendering what? What do you mean “hangs?” Etc, etc…

I designed a solid water cooler. When I boolean unioned different sub-bodies, it took me a long time to finish. When I changed the view from wireframe to rendered, Rhino stopped working and closed the file. When I open the old file, it shows the previous unsaved file.
computational time1

Run SystemInfo and post the results here, to start.