Windows Losing DNS

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  1. Posts : 67
    Windows 10 Home 64-bit
       #1

    Windows Losing DNS


    Windows 10 20H2.

    Windows 10 is randomly losing DNS and therefore this stops my access to the internet.

    However when the problem occurs, all other network access still works (eg/ network drives).

    It is random - it has happened twice today and other times occurs once a day or once every few days.

    The only solution is to reboot the PC and that fixes it every time.

    This was actually such a problem that I am running a clean install (I formatted the PC and reinstalled Windows a few days ago). The problem persists.

    The Windows Network troubleshooter doesn't fix it, neither does ipconfig renew and release. Flushing DNS does nothing.

    I have a second network card and that is doing the same.

    During the issue - ipconfig does show DHCP is disabled though (when of course it normally is enabled).

    I thought it might be a router issue however, setting a static IP, Gateway, DNS etc on my PC makes no difference.

    I have tried my ISP's (Virgin Media) DNS and Google. No difference.

    Again, reboot the PC and it all works again.

    In the Windows Event log, this error looks suspicious:

    Router Advertisement settings have been changed on the network adapter 3. The current M - Managed Address Configuration flag is false and the O - Other Stateful Configuration flag is true. User Action: If you are seeing this event frequently, then it could be due to frequent change in M and O flag settings on the router in the network. Please contact your network administrator to have it resolved.

    Good luck on this one as so far I've no idea how to fix it.
      My Computer


  2. Posts : 8,159
    windows 10
       #2

    When it goes open a cmd prompt type
    ipconfig /all

    poat results. The the network signal is low or dropped it give a dns error
      My Computer


  3. Posts : 1,606
    win10 home
       #3

    Try resetting the modem.
      My Computer


  4. Posts : 67
    Windows 10 Home 64-bit
    Thread Starter
       #4

    Samuria
    When it goes open a cmd prompt type
    ipconfig /all

    poat results. The the network signal is low or dropped it give a dns error
    Will do (the PC is connected via cable/ethernet).

    joeandmarg0 said:
    Try resetting the modem.
    Ah yes - I meant to say...I have restarted the modem/router various times and done a complete reset once. No difference.
      My Computer


  5. Posts : 2,733
    Windows 10
       #5

    I would say it is a fault in the Modem/Router, either Hardware or Firmware.
    You can get alternatives that are not ISP supplied ones.

    You can either get just a Router and use ISP supplied one as the modem, or replace the lot.

    You have pretty much covered the possibilities. Don't know whether you have done Router Firmware updates or checked Modem/Router logs, or other devices that could be a DHCP server.
      My Computer


  6. Posts : 67
    Windows 10 Home 64-bit
    Thread Starter
       #6

    Helmut said:
    I would say it is a fault in the Modem/Router, either Hardware or Firmware.
    You can get alternatives that are not ISP supplied ones.

    You can either get just a Router and use ISP supplied one as the modem, or replace the lot.

    You have pretty much covered the possibilities. Don't know whether you have done Router Firmware updates or checked Modem/Router logs, or other devices that could be a DHCP server.
    Indeed I am running out of options.

    Modem/router logs give no clues.

    Firmware updates are done automatically and not accessible by a user.
      My Computer


  7. Posts : 1,807
    Windows 10 Pro 21H1 19043.1348
       #7

    Please post results of ipconfig /all as requested in post #2.

    This could show important details and save lots of back & forth time with several question / answer sessions.
    Ideally, this would be run immediately after a disconnect incident. Thanks
      My Computer


  8. Posts : 1,606
    win10 home
       #8

    Could you amplify the ---restarted--- please.
    There are two procedures with different results.
    One is ---reboot---
    the other is ---reset---
    My modem doesn't use ---restart---
    Thanks.
      My Computer


  9. Posts : 2,190
    Windows 11 Pro (latest update ... forever anal)
       #9

    Hard wired (ethernet cable/LAN) or wireless connection to device?

    When does it happen - during usage? When starting up? Do you switch between ethernet cable <> wireless?

    Post an image of the adapter settings window - right click network icon in Systray > Open network & internet settings > Advanced network settings , Change adapter options. Post the next page.

    How do you set/change your DNS settings? What DNS setting(s) are you using?
      My Computers


  10. Posts : 1,606
    win10 home
       #10

    Forgot to mention,to reset my modem I must use a paper clip.The hole is near the On/Off switch.
      My Computer


 

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