Microsoft Product Support Newsgroups at http://support.microsoft.com/newsgroups/default.aspx .
MSDN Newsgroups at http://msdn.microsoft.com/newsgroups/ .
Technet Newsgroups at http://www.microsoft.com/technet/newsgroups/ .
For security issues within specific .NET Framework technologies, refer to the appropriate newsgroup:
Microsoft Security Newsgroups at http://www.microsoft.com/technet/newsgroups/default.asp?url=/technet/newsgroups/NodePages/security.asp .
Virus Newsgroup at http://www.microsoft.com/technet/newsgroups/default.asp?url=/technet/newsgroups/NodePages/security.asp .
.NET Framework Security Newsgroup at http://msdn.microsoft.com/newsgroups/loadframes.asp?icp=msdn&slcid=us&newsgroup=microsoft.public.dotnet.security .
ASP.NET Security Newsgroup at http://msdn.microsoft.com/newsgroups/loadframes.asp?icp=msdn&slcid=us&newsgroup=microsoft.public.dotnet.framework.aspnet.security .