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Network Adapter and USB disconnect

Level 7
I am having an issue that pops up during three specific situations. Ether editing photos in Luminar , video in Filmora 9 or browsing certain sites. e.g. Nexus Mod and even this site some of the time.
My network adapter and front end USB disconnect. Not intermittently, just flat disconnects. If I try restart or even power down (via the operating system and a tap of the power button) the screen goes black with windows loading circle until I hold power button.
Operating system: Win 10 pro upgrade from 8.1 pro
Motherboard: Asus Prime B450M-A/CSM (Bios 1804) (Latest chip-set drivers)
CPU: Ryzen 5 2400G
GPU: NVIDIA GeForce RTX 2060 (Latest NVIDIA drivers)
Memory: Corsair DDR-42132 (1066 MHZ) 2X8GBytes Slots #2 and #4

Any suggestions as to why and how to correct?