Good information makahoward! Whether or not this fixed it, it does sound like things are getting better for you which is the important part. This also shows that thankfully, in your case, Dell was NOT the problem. Regarding your question about what IPv6 is?
Internet Protocol version 6 (IPv6) is a network layer protocol for packet-switched internetworks. It is designated as the successor of IPv4, the current version of the Internet Protocol, for general use on the Internet. -- Wikipedia
I'm not a network guru by any means but apparently the issue is with the DNS servers, not your system. However, disabling it helps correct the problem.