Under which circumstances does the System process (PID 4) retain an open file handle?

Question

My application running on a Windows server makes use of a Jet/Access database. For some reasons around every two weeks that database file gets locked by the System process (

Answer 1

Check the security settings for each folder and subfolders. Make sure that the system did not just automatically create a special permissions setting which will not allow anyone to delete the file. Apparently for some odd reason the OS creates a weird special permission setting that protects the file from being deleted.