Disable IPv4 Large Send Offload, Checksum Offload, and TCP Connection Offload On the RDP client: [HKCU\Software\Microsoft\Terminal Server Client] "Keep Alive Interval"=dword:00000001 On RDP server: [HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server] "KeepAliveInterval"=dword:00000001 "KeepAliveEnable"=dword:00000001 Disable all SNP Features on the server (from admin cmd): netsh int tcp set global chimney=disabled netsh int tcp set global rss=disabled netsh int tcp set global taskoffload=disabled netsh int tcp set global autotuninglevel=disabled netsh int tcp set global congestionprovider=none netsh int tcp set global ecncapability=disabled netsh int tcp set global timestamps=disabled Change the Security Layer for RDP sessions in tsconfig.msc http://technet.microsoft.com/en-us/library/cc770833.aspx Reissue the X509 certificates (these are the certificates the TS uses to secure the RDP Session) http://support.microsoft.com/kb/329896 (Instructions are under the "Resolution" part) Also, take a look at this article: http://blogs.technet.com/b/askperf/archive/2010/03/25/the-curious-case-of-event-id-56-with-source-te...