Weird Wifi DNS issue

Question

Hi all,
I recently reinstalled windows 7 on my laptop and began to encounter very annoying wifi issues. It will connect to my router but the small yellow excalmation mark always notifies me that I have no internet access. Wired connections work fine however. So
recently someone suggested it may be a DNS issue and I tried switching to the Google DNS servers for IPv6 (2001:4860:4860::8888 and 2001:4860:4860::8844). That resolved my issue perfectly and I was finally able to use wifi again. Just as a test, I switched
back to "Obtain DNS settings automatically" and it continued to work, so I left it at that. However, two days later it stopped working all over again. I tried switching to the Google DNS settings again and it didn't work. I tried using the IPv4 settings
and it didn't work. I tried that whilst disabling IPv6 and it still didn't work. 
The most frustrating part is I tried pinging internal stuff and it works fine, for example, 127.0.0.1, my router IP, another computer on my network (which works fine). I'm even able to log into my router configuration page on Chrome, but anything else doesn't
work, including webpages and even Steam.
Any ideas?

Answer 1

You need to talk to your ISP's Technical Support.  The DNS addresses are supplied by your ISP and are usually listed in the modem or router depending on your setup.  The DNS address in Windows should be the base address of the modem/router. 
If your losing DNS addresses when using WiFi you need to look at the settings within the WiFi router.
It is very feasible your are experiencing random failure of your WiFi router or you system's WiFi chip, or you may have a defective driver for your system WiFi chip.
If another computer's WiFi works, then most likely it's either a defective WiFi driver or the WiFi chip itself going bad on your system and not a Windows 7 problem.
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