WiFi 5GHz Has Disappeared on Both Computers Solved

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  1.    28 Dec 2018 #1

    WiFi 5GHz Has Disappeared on Both Computers (Solved, apparently)


    I know that it was there on my computer, perhaps a month ago when the WiFi card was replaced, and I know that both the 2.4GHz and 5GHz entries were there on both computers in the past. Yesterday morning, when I found my machine off-line, and the DSL Internet light blinking wildly, the first thing I did was to click on the task bar icon, only to find that only the 2.4GHz setting was there.

    Some investigation found that 5GHz was also not shown on my wife's computer, with both 2.4 and 5 shown in Settings/WiFi/Manage Known Networks, but the 5GHz had been removed from mine. I added 5GHz, which still did not show in Show Available Networks.

    When Centurylink eventually started working, I checked my smart phone, which uses the same WiFi as the computers, and it was connected at 5GHz, meaning that the router was set correctly.

    The only thing that I can think of, and it is nothing more than an uneducated observation, is that the only thing that the two computers have shared in common since I last knew that 5GHz was working on mine--and not having checked hers for an unknown time span--is the interim updates to Windows 10 Home 1803, as though something in Windows is blocking 5GHz.
    Last edited by Not Myself; 30 Dec 2018 at 12:37.
      My ComputerSystem Spec

  2. Caledon Ken's Avatar
    Posts : 12,777
    Windows 10 Pro x64 Build 1809
       28 Dec 2018 #2

    Hi Not Myself.

    Did you power reset the router, power off, wait 30 seconds, power on.

    On one machine you might quickly try a network reset.

    Start > Settings > Network and Internet > scroll to bottom of right hand side > Network Reset

    If you have any specialized communications software you may have to reinstall it, things like VPNs.
      My ComputerSystem Spec

  3.    28 Dec 2018 #3

    Caledon Ken said: View Post
    Hi Not Myself.

    Did you power reset the router, power off, wait 30 seconds, power on.

    On one machine you might quickly try a network reset.

    Start > Settings > Network and Internet > scroll to bottom of right hand side > Network Reset

    If you have any specialized communications software you may have to reinstall it, things like VPNs.
    Thanks for the assistance.

    Yes, router has been reset at least twice, including after doing the suggested Network Reset, with no 5GHz available.

    In fact, the WiFI 5GHz that I added yesterday was no longer there; I added it again, restarted computer, still not found, nor is it found on the other computer. Rather obvious to me that something is blocking 5GHz on the two computers, and again, with no knowledge whatsoever about this, my suspicion is that it is Win10 that is the culprit. I have no way of proving that, I have not seen anything pertaining to that theory on-line, etc., it is nothing more than a "Gosh,, on what can I blame this problem?"
      My ComputerSystem Spec

  4.    28 Dec 2018 #4

    It seems to me that maybe your router is not broadcasting the 5G signal anymore.

    Do you have other wireless devices (cell phone, tablet etc) and if so can you see the 5G network on any of them?
      My ComputerSystem Spec

  5.    28 Dec 2018 #5

    The OP indicated that their phone is able to connect to 5GHz.

    @Not Myself

    Just to clarify - you are manually adding the network name to Manage Known Networks and after rebooting the entry is gone?

    You can look at Event Viewer->Windows Logs->System to see if there are any WiFi/WLAN-related entries during that time.

    You can also try running a 3rd party WiFi scanner like Free Trial Home Wifi Scanner | Generic WiFi passwords | AcrylicWifi and see if it's able to pick up your (or any) 5GHz network.
      My ComputerSystem Spec

  6.    28 Dec 2018 #6

    PolarNettles said: View Post
    The OP indicated that their phone is able to connect to 5GHz.
    Yes, I see that now. Never mind
      My ComputerSystem Spec

  7.    29 Dec 2018 #7

    PolarNettles said: View Post
    The OP indicated that their phone is able to connect to 5GHz.

    @Not Myself

    Just to clarify - you are manually adding the network name to Manage Known Networks and after rebooting the entry is gone?

    You can look at Event Viewer->Windows Logs->System to see if there are any WiFi/WLAN-related entries during that time.

    You can also try running a 3rd party WiFi scanner like Free Trial Home Wifi Scanner | Generic WiFi passwords | AcrylicWifi and see if it's able to pick up your (or any) 5GHz network.
    I first added 5GHz when it did not appear on my computer, but was still shown in WiFi, but not used, on my wife's computer. My entry was removed when I rebooted, and that happened again after I tried the Network Reset. I have not rebooted my wife's computer, but when I do, I suspect that the WiFi entry for 5GHz will be removed.

    AcrylicWiFi cannot find the 5GHz on my computer. I will look at Event Viewer sometime today, and report findings/lack of findings. The router software clearly shows the presence of, and activation of, the 5Hz signal, which now only reaches my phone, but neither computer.

    Later: As threatened, I did look at Event Viewer; nothing found.
    Last edited by Not Myself; 29 Dec 2018 at 10:23.
      My ComputerSystem Spec


  8. Posts : 1,261
    Windows 10 Home x64 and Pro x86
       29 Dec 2018 #8

    It would be worth checking the computer maker's support site for WiFi card driver & BIOS updates.

    Denis
      My ComputerSystem Spec

  9. Caledon Ken's Avatar
    Posts : 12,777
    Windows 10 Pro x64 Build 1809
       29 Dec 2018 #9

    If you suspect Windows undo the the recent patches.

    I would also check that router is set to broadcast SSID of 5Ghz network.
      My ComputerSystem Spec

  10.    29 Dec 2018 #10

    I am assuming that your router has separate SSIDs for your 2.4GHz and 5GHz networks - something like MyWifi and MyWifi_5GHz, correct?

    When you manually add a network to Manage Known Networks you don't specify whether it's 2.4GHz or 5GHz. So I don't know by what mechanism an entry could be automatically removed.

    Do your PC and your wife's PC use the same WiFi adapter model?
      My ComputerSystem Spec


 
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