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Tuesday, August 23, 2016

Limited Connectivity and DNS_PROBE_FINISHED_BAD_CONFIG


Laptop was unable to connect to the Internet but mobile phones and the PC were connected. Laptop internet connection indicated "Limited Connectivity". The browser would also indicate the following: DNS_PROBE_FINISHED_BAD_CONFIG

Followed a lot of advice online but no go. Finally landed on the following page:

http://appuals.com/best-fix-steps-fix-dns_probe_finished_bad_config/

So far, it worked.

To summarize, first, run ipconfig /flushdns on a command prompt.

Second, set the wifi network adapter's IPv4 settings as follows:

Preferred DNS SERVER: 8.8.8.8
Alternate DNS SERVER 8.8.4.4

On hindsight, changing the power management options for the laptop's wifi connectivity to Maximum Performance may have helped, too. It seems that when the laptop is under battery power, it disables the Internet connection to preserve battery power when it only has a charge below 50% remaining. Make sure that the laptop is connected to the charger and is connected to the power outlet to avoid being hampered by this issue during troubleshooting.

Addendum:
Three days after posting this, my PC lost its internet connection while undergoing an update on AVG antivirus. I have a suspicion that the same thing happened to the laptop which is why it lost its internet connection. Aside from the commands above, the following have been useful in troubleshooting.

ipconfig /release
ipconfig /renew
netsh winsock reset

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