This is a Windows system installed file with Windows File Protection (WFP) enabled.
itss.dll has 53 known versions, the most recent one is 6.3.9600.16384 (winblue_rtm.130821-1623). The average file size is about 137.75 KB.
(Note, the programs listed below are for all versions of Microsoft® InfoTech Storage System Library.)
(Note, the behaviors below are for all versions of itss.dll, select a unique version for details.)
United States installs about 48.61% of Microsoft® InfoTech Storage System Library.