I'm also seeing this sometimes. Don't use Norton. More often the pages won't load properly (as if it can't resolve the DNS address). It happens in Firefox too.... There is an issue with win8 as the same machine with win7 works perfectly
I am having exactly the same issue, with all browsers. At first I thought it was an issue with Chrome but Firefox is the same. It didn't seem to be resolving the DNS so I tried manually setting the DNS servers to google (8.8.8.8), at first this seemed to do it but I have the same issue again...