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Suppose, when you leave your computer running while it's connected to internet and after a while if your WiFi modem freezes in the middle, then there would be a "Limited or No Network connectivity" message indicated by a yellow warning sign on the "Internet access" icon in system tray.

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Could you get a timestamp for when this actually occurred in Event Viewer or in some other way?

So far I was only able to find the Event IDs under "WLAN-AutoConfig" for when the network was actually connected and disconnected.

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In the event viewer we can enable logging of WiFi. It gives detailed logs of the signal strength of WiFi.

The complete process including screenshots is given here.

  1. Open the Windows Event viewer (eventvwr.msc) and then within the View Menu enable the Show Analytic and Debug Logs options.

  2. Navigate to the WLAN-autoconfig event log. Since we enabled the Analytic and Debug logs option, beside the Operational log we also see the Diagnostic log.

  3. The Diagnostic event log by default is not enabled, so first we have to enable it by right-clicking -> select Properties.

  4. As soon as the Diagnostics mode is enabled you should see events coming in. To enforce things a bit simply disable and enable your wireless connection using your vendor's wireless connection software or by pressing the hardware button on your laptop.

You can see when the WiFi signal is lost.

  • @karel , thanks for the edit. I thought the link describes it all. – prashanth kumar Apr 29 '16 at 7:32
  • I thought so too however any answer that does not have an explanation in the body text, even a good answer, may be closed by reviewers as a link only answer, mainly because links can become unavailable over time and frequently do, while an answer that has an explanation in it is permanent. – karel Apr 29 '16 at 7:35
  • @karel, true i agree. – prashanth kumar Apr 29 '16 at 7:44
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In case you just need to know when internet access was lost / restored regardless of state changes of various network devices, navigate to UTC in Event Viewer:

Applications and Services Logs/Microsoft/Windows/UniversalTelemetryClient/Operational

Look for event ID 55. It displays a friendly text "Is the Internet available:" followed by true or false.

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I checked a handful of event logs in Windows 10 and tested this by disconnecting and reconnecting my wifi and seeing which events popped up. I haven't verified that these are perfectly correlated with wifi disconnections, but it's been useful for my purposes:

Applications and Services Logs\Microsoft\Windows\WLAN-AuutoConfig\Operational (Events 2002 and 2010 occur when wifi disconnections AND connections)

Applications and Services Logs\Microsoft\Windows\Windows Firewall With Advanced Security\Firewall (Events 8003 and 11004 occur for disconnections; 8000, 8001, 11000, 11001, 11005, and 11010 occur for connections)

  • For the WLAN-AutoConfig event log I have 8001 for connecting to a wifi network, and 8003 for disconnecting from a wifi network. I see no 2002 or 2010 events in my log. I'm using Windows 10. – carlin.scott Dec 31 '18 at 21:36
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I use Windows 10, and in my event viewer under Applications and Services Logs/Microsoft/Windows/NetworkProfile/Operational I find the event IDs 10000 for connected to a network and 10001 for disconnected from a network.

  • OP was not asking about when a connection is made or lost, but when there are any issues with the connection. Please focus your answers on the question that is actually being asked. – music2myear Jan 31 at 23:30

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