Hey!
Previously a V4 user and had very little issues with it. Have upgraded to V6 and as most people would do I have certain likes and dislikes when it comes to how the viewport is displayed in the working window. I am finding it for no rhyme or reason resets all my preferences back to default, can be once a day or every few seconds! Any ideas?
Otherwise happy with the changes the new version offers 
Regards, Paul
Rhino 6 SR12 2019-1-29 (Rhino 6, 6.12.19029.6381, Git hash:master @ ae9d7fba5fda0b43002dc44a34e059a9a382db04)
License type: Commercial, build 2019-01-29
License details: Stand-Alone
Windows 10.0 SR0.0 or greater (Physical RAM: 16Gb)
Machine name: LAPTOP-46E0F4JB
Non-hybrid graphics.
Primary display and OpenGL: Intel® HD Graphics 620 (Intel) Memory: 1GB, Driver date: 6-18-2018 (M-D-Y). OpenGL Ver: 4.5.0 - Build 24.20.100.6170
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: Height
Vendor Name: Intel
Render version: 4.5
Shading Language: 4.50 - Build 24.20.100.6170
Driver Date: 6-18-2018
Driver Version: 24.20.100.6170
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 1 GB
Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.12.19029.6381
C:\Program Files\Rhino 6\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 6\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.12.19029.6381
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\Alerter.rhp “Alerter”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.12.19029.6381
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.12.19029.6381
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
Hi Paul - you might take a look here for some conversation about problems with this same GPU:
Seems like it might be a common-ish Lenovo thing - I don’t know if that is what you have.
-Pascal
Thx, will have a look