I Need Help

I recently got a new computer, and I've been having a few problems with the internet. Occasionally, I will get this error. If that page loads properly for you, the error is, "Oops! This page appears broken. DNS Error - Server cannot be found." It's been popping up quite often, even with sites that should have no problem.

Also, not sure if it matters, but I pinged my IP because someone recommended I do so, and I received this error, "Unable to contact IP driver. General failure."

If you would be so kind, what does it mean and how do I fix it?