Windows 10: Slow WiFi until Change Setting On Adapter. Then Eventually Slows Again

Hi All,
I have a very weird problem and after some help if possible.

I have a rock-solid 100Mbit cable connection and my laptop is only a couple of metres away from the wireless router.

I check the speed at Speedtest by Ookla - The Global Broadband Speed Test and get an unstable speed reading that peaks at about 40Mbit. I will retest 10 times to ensure the reading is accurate.

I then go to Device Manager and open up the properties of the Wifi Adapter and change any setting (such as preferred band) and hit 'ok', the adapter seems to restart.

I then go to Speedtest by Ookla - The Global Broadband Speed Test and it is a rock solid 98-99Mbit for 10 tests.

After a while, it will eventually slow back down again. The only solution is to go back to device manager change a setting in the WiFi adapter again, which immediately speeds it back up.

What I have Tried:
Tried multiple drivers for Wifi Adapter.
System File Check
Fresh install of Windows 10 (last week for another issue)
Disable DHCP and Set manual IP from PC settings
Reserved an IP on router side
Just about every combination of settings in Wifi Adapter

Any ideas what could be causing this behaviour?

Any help greatly appreciated.

Cheers
Mick

----------------
Acer Predator Helios 700 Laptop
Win 10 Pro (Latest update v2004 - yesterday)
Intel 9980HK (normally clocked)
Geforce RTX 2080 (normally clocked)
Wifi - Killer Wi-Fi 6 AX1650 (latest drivers)
Router - Netgear WNDR4500

:)

 

Slow Wifi

Really sorry for the late reply I was locked out from this account and it has taken me a few attempts to get back on.

The wifi is slow right from the start, I did a full reboot this evening and it was still slow.

This evening I have followed all of the steps here, although this post seemed to be resolved due to a non compatible range improver there were a lot steps that seem to be repeated in other forums.

VERY Slow Internet After Upgrade to 10 - Windows 10 Help Forums

Rather than have anyone who is willing to help have to read through it all the main points are below:

Reinstalled drivers

Set Windows to automatically find drivers - all up to date

Run Troubleshoot - no problems

Ran Cmd prompt - netsh int ip reset c:\resetlog.txt

There was another suggested fix:

1) Go to Network and Sharing Center

2) Change adapter settings

3) Right click on Wi-Fi adapter, select properties

4) Click on configure, then go to advanced tab

5)Property:802.11n Value: 20/40 Auto

But I don't have this as an option only 802.11d

I can only think the network adapter isn't compatible with windows 10. Any help that can be given is greatly appreciated.

 

Wifi Very Slow

Hi,

The following are some reasons that may cause of the slow WiFi connection.

• Corrupted or incompatible drivers.
• Missing updates.
• Network connection settings.
• Hardware or software problems.
• Inappropriate distance from the router or obstruction.
• Interference with other devices.

To isolate the concern, have you checked if the issue persists with other devices? For now, we suggest that you follow the troubleshooting steps provided in this
article.

 

Surface Pro 4 WiFi Slow Connectivity

Changing the Preamble on my Nighthawk router fixed my slow wifi on my SP4 also. THANKS!!!!!