Hi to everyone, Although I'm running XP Pro SP3 and the last version of RDC (Shell and Control 6.1.7600 & RDP 7.0 supported), when I try to connect via RDWC to W7 server I get the Network Authentication Level error;however, there is not problem if the connection is via RDC. Some Idea why is it happening? I fixed the registry keys, securitypackages and security providers, but nothing happens. For security reasons, I wouldn't like to change the connection options on my W7 server. Thanks in advance for your help.