Windows 10 wifi slows down until reboot

Anonymous
2019-08-16T12:11:47+00:00

Hello

i have noticed a problem with my Lenovo Legion laptop

After a while the internet connection completely slows down to the point it is pretty unusable, however a simple reboot fixes he issue until of course it slows again over time.

i've tried lots of things to rectify that i have seen online, but nothing has resolved the issue. i have all the latest window updates and network driver updates as far as i can tell. i've disable my AV and tested and that makes no difference.

Can someone help please?

Cheers

Windows for home | Windows 10 | Internet and connectivity

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Anonymous
2021-01-29T20:57:32+00:00

I found a very possible solution.

Go to settings - > network -> status -> change adapter options

select your wifi adapter.  right click and select "properties"

select the first "configure" button

go to the "advanced" tab.  select "preferred band" and select "prefer 5GHz band"

This will force your wireless adapter to stay on the 5GHz band of your router.

If all your devices intend to use the 5GHz band, disable the 2.4GHz band on the router (although not recommended as many other devices such as IoT uses the wider, slower band)

The BUG:

I appears that windows will constantly hunt for the stronger signal even if it is the slower signal.   For example, if you were moving around your house with your laptop, you may have started on the 5GHz band, but it picks up the 2.4GHz as stronger, and goes on there.  Your network speed instantly drops.  (this will even happen if you are stationary).  

HOWEVER, even if you go back to an area with strong 5GHz coverage, windows does not return to the 5GHz speeds.  For whatever reason, the speed stays limited to the slower output.  That's why if you reboot or turn off and on the adapter, it resets it and you get max throughput again.

Microsoft should really fix this bug.

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  1. Anonymous
    2022-04-09T21:34:41+00:00

    What worked for me as lacrumb said in another forum:

    Check Device Manager, Network, WIFI Adapter, Power Management,  make sure there is not a click in front of "Allow the computer to turn off this device to save power".

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  2. Anonymous
    2022-02-20T21:37:04+00:00

    Thanks.

    I am giving it a try.

    Flin

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  3. Anonymous
    2022-02-17T17:54:30+00:00

    Unfortunately that was the first thing I did after installing the adapter as I was aware of the potential issues caused by it in the past.

    Glad it worked for you - let us know if the issues reoccur, as I find that any changes seem to "fix" the issue but very-temporarily only.

    Still keeping my eyes out for a solution but I purchased a new Wifi 6 network card using latest gen chip, and disabled the built in device on the motherboard. That seems to have worked for a few weeks already so I think this is either something BIOS or firmware related as it's the onboard device that seems to have this issue only.

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  4. Anonymous
    2022-02-17T17:41:57+00:00

    I had this issue and found a fix that actually worked.

    1. Go to Device Manager -> Network Adapters and fine your wireless adapter
    2. Right click -> Properties -> Power Management
    3. Disable "Allow the computer to turn off this device to save power"

    Since doing this I haven't had any slowdown issues despite not rebooting for the last week. Hope this helps someone!

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