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
    2020-04-12T00:35:17+00:00

    I have found that disabling the "Marvell" WiFi adapter (in control panel/network settings) and re-enabling it currently fixes the issue for me,

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  2. Anonymous
    2020-04-11T23:51:20+00:00

    I reinstalled Windows yesterday and only installed a few essential apps. I will monitor its behaviour and report back in a few days.

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  3. Anonymous
    2020-04-11T20:09:01+00:00

    I have the same issue with Intel(R) Wireless-AC 9560 160MHz. The wifi shows good good speeds after a reboot.but it goes down drastically after a day or 2 without restart. Even disabling/enabling or doing a network reset on the wifi adapter works. But this should not happen ideally. Is there some kind of cache or something that gets full and only a reset /restart will empty that cache?(just a thought).

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  4. Anonymous
    2020-04-03T14:04:52+00:00

    I have been facing the same issue for the past 10 days. My computer has gigabit Ethernet (Intel I219-V) and when the issue appears the speed of the adapter drops to 3-4Mpbs. It is apparent when running an internet speed test (speed drops from ~100Mpbs to ~3Mbps), as well as in my home network, where file transfer speeds drop from ~110MB/sec to ~350kb/sec.

    Computer restart fixes the problem temporarily. I have all updates and all the latest drivers installed. I even tried with different Ethernet driver versions but the result was the same.

    My computer also has a wifi card, so if I switch to the wireless connection (the moment the problem appears), speeds are absolutely normal. Switching back to the LAN connection, and the problem is there (until I restart).

    It is not cable or router related, I have checked those as well. I also disabled the AV software (ESET Internet Security), with no results.

    The only thing I haven't tried is reinstalling Windows, which I would like to avoid. I am pretty sure it has to do with an update or something, but haven't been able to pinpoint it. Has anybody found a solution yet?

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