Session state is released as soon as the last window to reference that data is closed. However, users can clear storage areas at any time by selecting Delete Browsing History from the Tools menu in Internet Explorer, selecting the Cookies check box, and clicking OK. This clears session and local storage areas for all domains that are not in the Favorites folder and resets the storage quotas in the registry. Clear the Preserve Favorite Site Data check box to delete all storage areas, regardless of source.
Session state is released as soon as the last window to reference that data is closed. However, users can clear storage areas at any time by selecting Delete Browsing History from the Tools menu in Internet Explorer, selecting the Cookies check box, and clicking OK. This clears session and local storage areas for all domains that are not in the Favorites folder and resets the storage quotas in the registry. Clear the Preserve Favorite Site Data check box to delete all storage areas, regardless of source.
http://msdn.microsoft.com/en-us/library/cc197062%28v=vs.85%2...