Displaymode in render view with shadows is block

display mode in render view with shadow is block
please help me

Rhino 7 SR0 2020-6-30 (Public Build, 7.0.20182.13135
Windows 10.0 SR0.0 or greater (Physical RAM: 8Gb)

Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce GT 320M (NVidia) Memory: 1GB, Driver date: 12-11-2009 (M-D-Y). OpenGL Ver: 3.1 NVIDIA 188.37
@wim

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height

Vendor Name: NVIDIA Corporation
Render version: 3.1
Shading Language: 1.30 NVIDIA via Cg compiler
Driver Date: 12-11-2009
Driver Version: 8.16.11.8837
Maximum Texture size: 8192 x 8192
Z-Buffer depth: 24 bits
Maximum Viewport size: 8192 x 8192
Total Video Memory: 512 MB

You are lucky that it even loads. Your computer would be weak for running Rhino 2 or 3.

One of the reasons McNeel develops later versions is to take advantage of the advances in computer technology. They do try to maintain some backward compatibility, but what you are trying to do is beyond reason.

Take a look at the basic requirements for Rhino 6 here:

https://www.rhino3d.com/6/system_requirements

Right now Rhino 7 requirements are the same, but that could change.