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
    2020-06-26T01:39:09+00:00

    I have the exact same problem on my MSI desktop. My wireless network adapter is Intel Wi-Fi 6 AX200 160MHz. The Wi-Fi speed will slow down to a trickle after the PC is turned on for a while. But the Wi-Fi speed from the same router on my phone stays perfectly normal.

    I haven't tested if the problem persists with Ethernet cable connection, but some users here seem to have the same problem even with cable connection.

    I've tried updating my network adapter driver, and it temporarily restored the Wi-Fi speed, but after a while it slowed down again. A reboot solves the problem almost every time. 

    I've also tried Glucos' suggestion of disconnecting and reconnecting Wi-Fi, and it also works most of the time! That's way less hassle than a reboot. But still, someone should look into this bug! 

    Edit: After reading Mr. Sketch's reply, I've tried disabling and re-enabling the wireless network adapter. It restored the full Wi-Fi speed, but I don't know if it will stay that way. Fingers crossed.

    Edit2: Nope, tried it, disabling and re-enabling the wireless network adapter only provides temporary fix.

    Edit3: I downloaded this new wifi driver (v21.90.3) from Intel website that seems to have solved the problem! Will report back if the problem recurs.

    https://downloadcenter.intel.com/download/29520/Windows-10-Wi-Fi-Drivers-for-Intel-Wireless-Adapters

    Edit4: Nope, didn't work. Problem persists.

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  2. Anonymous
    2020-05-17T17:16:45+00:00

    In my case, disconnecting and reconnecting the wifi (2 mouse clicks) re-establishes full speed. But whoever "caused" this bug (Microsoft, Intel, Lenovo) should really fix it.  It never happens with my iphone.

    It sounds like a lot of people have been having this problem for quite a while.

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  3. Anonymous
    2020-05-17T08:30:08+00:00

    I have the sane issue in my Dell 8920 desktop.  Every few days the internet slows to a crawl, a reboot fixes it.

    ive read the comments on here, but there does not seem to be a permanent fix.

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  4. Anonymous
    2020-05-16T20:19:15+00:00

    Thanks for the link, will check it out.  I don't think I have a Marvell adapter my Lenovo x1 but will check again.

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