Glad you were able to find the culprit. Not sure how to advise from here... possibly downgrading firmware? For sure I'd try to get Dell's input on the matter first and foremost.

I second the cable suggestion. Or possibly monitor. Your screen grab came through perfect so I believe the issue would be after the video card.

Since you're on a laptop could you start bypassing gear and go right to the router and see if you're problem persists?

LAN side of router (Nighthawk X6 R8000)

184326

WiFi 5ghz in MB/s

184328

speedtest VS. testmy.net is... :confused: (keep in mind MB VS Mb)

Even with a 10gig uplink theres still ALOT to be desired from AD.

Starting at, for sure, 35ft and possibly as little as 25ft (also,direct line of sight) you'll barely saturate 1gig.

Nighthawk...

Excellent post and thanks for the direction. Great starting point!!

I used the tutorial to move my user folders to a spare, second drive in my laptop. Now I'm thinking about changing it from a spinner to an SSD and I'm wondering what steps I should be considering,...