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Possible Solution to Win 10 WiFi Connection Problems
PC - Toshiba with Atheros AR9002WB chipset.
Symptom - After upgrading to Win 10 Pro from Win 7 Pro, my wifi connection started to periodically drop... that is, more specifically, I was unable to access any internet communications. This would happen most often overnight, but occasionally after several hours of use in the daytime.
Disabling and enabling the wifi adapter did no good... I had to completely reboot in order to restore access. Upgrading to a different/newer driver made no difference.
And then, last night, when it failed again, I found out that while I could not access the internet, I could readily access the router via its IP address typed into a browser bar.
How weird is that? It demonstrates that the wifi connection to the router is definitely present and functional.
So... back to the Win 10 PC... I check out the properties of the TCP IPv4 connection... the RadioBox "Obtain the DNS Server Address Automatically".
I unchecked this box and manually entered the IP address of my router which I have set up for external DNS lookup. As soon as I saved the changes, my internet access was restored... no reboot... no nuthin'!
I conclude there is an issue with automatically obtaining a DNS server IP address although I have no idea of how to verify, except perhaps go back to auto DNS, then the next time it fails, see what ipconfig has to say.
Cheers.