On Windows Vista 64 and Windows 7 64, there is a 32 bit version of Remote Desktop Connection (Microsoft Terminal Services Client, mstsc.exe) in %SystemRoot%SysWOW64. Running this mstsc.exe will launch the 32 bit process but it will instantly launch the 64-bit mstsc.exe from System32 and shut itself down. This makes it impossible to run Remote Desktop Connection 32 bit. This is a problem when you have 32 bit Terminal Services add-ins (which won’t run under 64 bit).
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