New
#11
The DHCPv6 wouldn't have anything to do with the Start button or inability to open the Start menu or something inside like the AllApps or Windows Accessories. That is something totally different involving the network configuration you have going on there. But does suggest a likely bugged clean install as to why the problems are now increasing?!
On a fresh VM made overnight I ran into a slightly stubborn to open Start menu very briefly however and then cleared right up. The test VM was originally supposed to be an upgrade install of the latest build over the Threshold 2 update seen out in November but ended being a totally fresh install from the "$Windows~BT" folder copied onto a second partitiion once the vhd was expanded to allow that to be created. The install other then went smooth and fast!