DNS server could not be found (no replies)

I have WAMP server up and running and localhost working. I creating multiple vhosts using the Add a Virtual Host link. When I click on any of the virtual hosts, I get

This site cannot be reached
site server DNS address cannot be found.
* Did you mean [site.com]
Search Google for site
ERR_NAME_NOT_RESOLVED

I have no idea what the problem could be or where to start looking. Any help would be appreciated.