Rapidly running out of patience. Have done this....in this order
Physically disconnected the DYNADOCK PA3927A-1PRP DYNADOCK U3.0
Device Manager - Uninstall & remove drivers, ALL Dynadock devices, Video Adapter, Ethernet, Sound
Programs - Uninstall DisplayLink software
Ran "DisplayLink Installation Cleaner" to remove any traces
Cleared temps from C:\Users\<User>AppData\Local\Temp
Reboot
Installed Toshiba Ver 8.2 driver from here :
https://support.dynabook.com/support...ext=1200014770
Physically connected Dynadock
Occasional crash, but not as bad as later drivers
Ran Support Tool, files attached
Used this procedure to prevent Windows from updating drivers. Ver 8.2 now prevented from updating
Using Group Policy Editor
https://www.auslogics.com/en/article...cific-drivers/
Will try different drivers when time permits