Details - When COM clients in the client sessions query interfaces of COM servers that are running in session 0, multiple instance of the COM servers gets instantiate in client sessions even though COM server is running. This can be avoided by changing the value of following registry key as “nt authority\system”.
RunAs = nt authority\system
Note: We cannot use "nt authority\system" with a COM server that is not already started.
Posted By : Merlin S. Thadathil