Want to understand the details about Windows Vista's changes to the network stack, IP6, diagnostics etchttp://192.168.2.20/blogs/doverton/archive/2006/09/15/Want-to-understand-the-details-about-Windows-Vista_2700_s-changes-to-the-network-stack_2C00_-IP6_2C00_-diagnostics-etc.aspxhttp://www.microsoft.com/technet/windowsvista/netw... will be your answer. ttfn DavidenCommunityServer 2008.5 SP2 (Build: 40407.4157)