URGENT! Computer Reboots after tried to active Rendered viewport

Huge issue, every time i try to use rendered view on any viewport, without any geometry works, but once there is a geometry, my computer reboot, i tried to re install, but the issue still there, i created the geometry first then change to Rendered view and reboot again.

Is this a problem that recently started on your computer or has it always been like that?

Can you give us the specifications of your hardware, including the GPU? Also post your OpenGL settings in Rhino.