Hi After installing port explorer a program called vcguard ( www.shinkaiho.com/ ) throws up multiple errors when using yahoo chat. vcguard prevents large voice packets from lagging voice on messenger clients...problem is it just throws up a box saying ERROR! & nothing else (the box will open up multiple times if people are speaking on the mike although you will hear nothing. port explorer does not have to be running for it to crash vcguard it only has to be installed. I'm thinking it may be down to port explorer or a dll it installs intercepting the connections to the yahoo voice servers (or any ip for that matter) even when its not running. Or to put it bluntly....i think the new build of PE is a tad buggy. Can someone please point me towards an earlier version of PE so i might test that it is this new dll diamondcs are using -------------- Ive just noticed this post. You are right, dcsw2.dll is used by port explorer to monitor TCP & UDP connections made by your browser -------------- vcguard also monitors TCP & UDP connections & i believe they are conflicting with each other. So....this would mean that port explorer monitors even when it has not been started by the user...or am i wrong?