Hmm...that sounds like there ius a bug in the network layer - specifically the io completion/io cancel routines as such is OS/network card driver specific so would assume that it would work fine on anything else. Hmmm looks like Vista is bleeding edge:(

Well there is stuff on how to do this, and there is a few c# games written - some of them are even on this site. If you want to have a look at how to do this then perhaps you should try MSDN webcasts or http://www.digipen.edu/main/Webcast Ciao, M.:laugh: