I was trying to install WinCap but it keep telling to use at own risk + it wont let me install... Im using Windows 8 Dev-Pre... http://www.winpcap.org/install/default.htm
There's really nothing more we can do but suggest using compatibility mode.
The OS is only in developer preview stage so don't expect everything to work.
I know... that's what I have figured awhile ago... the beta only comes out when enough or trillion of software are compatible with it which is still in the process of making them compatible...