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Explaining Shadow Key Time Stamp |
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Thursday, 21 December 2006
by Michel Roth
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Wilco van Bragt has written a short article on the how, when and what of the Shadow Key Time Stamp utility: "If applications are installed on a Terminal this is normally done via Add/Remove programs or via change user /install command. This sets the Terminal Server in installation mode. When an application within this installation mode writes registry keys to the HKEY_CURRENT_USER Microsoft writes this key also in the HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software. These values in this key, called Shadowkey, will be applied to a user when he logs on to the Terminal Server if no keys (or older keys) are found in his profile based on a time stamp.
Because the checking is done on time stamp you can experience strange behaviors if a new server is applied to your infrastructure. This behavior occurs because the values in the Shadow key got the time stamp when they are installed. Users can have different settings in their profile, but with an older timestamp. When these users logs on to new server, the Shadow keys settings are written in their profile because the date is newer than the setting in the user profile, which is logically unwanted."
Read the article here.
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