If you encounter an issue with the Winpcap utility, try the following;
First, please uninstall WinPCap from your Control Panel. From the Windows Control Panel, uninstall WinPcap. Reboot. Reinstall WinPcap (it is distributed inside the Replay Media Catcher directory in C:\Program Files (x86)\Applian Technologies\ or it can be obtained directly from www.winpcap.org). During installation, make sure to leave the "launch at startup" button checked.