Windows 10: WiFi speed degraded, Ethernet fine

I have a Dell Inspiron laptop running a dual boot with Ubuntu. I have line-of-sight internet that runs at speeds of ~15 MB/s. Just before Christmas I noticed that the internet speed on my laptop dropped from ~15 MB/s to ~4 MB/s. If I use an ethernet cable off the modem (Netgear Nighthawk 7000) I get the full speed.

I have replaced the Intel AC-3120 wireless adapter with a Intel AC-9260 and the problem still exists in Windows 10. When I boot into Ubuntu I get the full speed that I should be getting (~ 15 MB/s).


Has anyone else seen a problem like this, and if so, how did you correct it?

:)

 

Abysmal wifi speed on Windows 10

I've checked that drivers are up to date. I have 2 different wifi cards and 1 usb wifi adapter. I tried just about everything. Reception on other devices is fine, including a device located in the same spot as computer. It's strictly the computer after updating
to Windows 10. My wifi speed starts fine but will quickly go down to about 0.1 to 2 mbps (instead of 15+) Nothing seems to fix this, other than a Network reset, after which speed is fine again but quickly degrades.

I'm on Windows 10 Pro, v1709 Build 16299.371

Summary:

• No program is hogging the connection
• Speed degrades on multiple wifi adapter simultaneously
• Can only be fixed by a Network reset
• Steadily degrades over time after a reset
• No wifi problems on other devices, even in same location
  
• Drivers up to date
• Speed degrades to 0.1-2 mbps with short, temporary bursts to full speed

 

wifi speed degradation in win 10 laptop

I am more confused now. I have 100/100 Mbps fios. the laptop achieves a speed of 101/118 when it is restarted. that to me means my settings are proper. Within 24 hours the upload speed drops to near 35-40 Mbps. At that point a simple restart of the laptop
brings the speed back to 100/118 Mbps range. That to me suggests that some processes within the computer are limiting the upload speed. all other computers are working at the specified FIOS speeds. I have tried using Ethernet as well as wifi.

 

wifi speed degradation in win 10 laptop

Thank you for the response. Actually, I have updated most drivers, that I think are relevant. I am thinking this is an issue with win 10, and apps. since a computer restart clears up the problem every time. as I mentioned, I tried Ethernet connection also
and had the same slow speed on upload . I am unable to see any differences in task manager between the times when the upload speed is normal and when it is degraded. Memory usage about 27-30 percent. On FIOS 100/100 service. Using a Linksys WRT1900ACS router.
Using speakeasy or OOKLA app for testing.