Thanks @wim and @chris for getting back to me!
Wim, yes, the screenshot suggests that the problem persists even if the Windows Defender and system firewall were turned off.
Chris, I have doubled check my R6 versions again and I have the most updated Rhino. SystemInfo shows that R6 SR 35 is on my machine (dated to 2021-08-10). I have attached screenshot and systeminfo texts here for reference.
Many thanks.
Rhino 6 SR35 2021-8-10 (Rhino 6, 6.35.21222.17001, Git hash:master @ 073ac7b225c67348731c6597127b9410126c3139)
License type: Educational, build 2021-08-10
License details: Cloud Zoo. In use by: zwang2 ()
Windows 10.0.0 SR0.0 or greater (Physical RAM: 64Gb)
Machine name: WANG
Computer platform: LAPTOP - Plugged in [100% battery remaining]
Hybrid graphics configuration.
Primary display: Intel(R) HD Graphics P530 (Intel) Memory: 1GB, Driver date: 1-8-2021 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA Quadro M5000M (NVidia) Memory: 8GB, Driver date: 6-5-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 443.32
> Integrated acclerated graphics device with 4 adapter port(s)
- Video pass-through to primary display device
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 6-5-2020
Driver Version: 26.21.14.4332
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 8 GB
Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.35.21222.17001
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Users\Wang\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\Fologram for Rhino (468a328b-20d9-494b-b9e1-cbe9f827d3a2)\2020.3.3.0\6\Fologram.IO.Rhino3d.Win6.rhp “Fologram for Rhino” 2020.3.3.0
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.35.21222.17001
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Users\Wang\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\PanelingTools (6caed836-bc06-4ebc-b1fd-e10886a0dc94)\2018.4.13.574\PanelingTools.rhp “PanelingTools”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.35.21222.17001
C:\Program Files\Rhino 6\Plug-ins\RhinoResurf\RhinoResurf_6.rhp “RhinoResurf”
C:\Program Files\Rhino 6\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 6.35.21222.17001
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.35.21222.17001
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V6\VRayForRhino.rhp “V-Ray for Rhino”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”