Tech Support: Annoyed with Losing Internet Connection - DNS isn't responding!

Annoyed with Losing Internet Connection - DNS isn't responding!

I have been using a Buffalo router and has been working fine.  But right now, it is annoying that I always lose my internet connection.  I look at my wireless connection displayed on my screen and it has an exclamation point whenever I lose connection. 
Whenever I run the troubleshooter, it gives me an error, The DNS server isn't responding."  Whenever this happens, I unplug both modem and router, plug them back in and connection is restored.  But doing this a couple of times everyday is very annoying.  I
already tried to bypass my router but the same thing happens, I still lose internet connection.  Is this a problem with my router or already my modem?  Thanks!
 
[Moved from feedback]

Solutions to the Problem Annoyed with Losing Internet Connection - DNS isn't responding!

Download Error Fixer (Free)

Using Windows troubleshooter:

• Click on Search on Charm bar and type Troubleshooting. Click on the very first option.
• A new window will open. Click View all from the left pane.
• Scroll down to the bottom and click on Windows update.
• Troubleshooter window for Windows update will pop up. Click on NEXT. It may ask you for administrative permission.
• The troubleshooter will automatically detect problems and fix it.
• Now, close this window and try download/install the app which was previously showing error.

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