Remote OS Monitoring

Hello and good day,

Say you have a Windows environment where all clients reside on the
same workgroup, connect through a Domain Controller, and are
administered by Active Directory. Are there any tools or techniques
out there that allow for remote monitoring (somewhat if not totally
transparent) at any finer level of granularity? Specifically, being
able to tell things like:

*User of a box has implemented EFS (Encrypted File System) possible to
hide information.
*User of a box has hidden a directory or file using either Windows
functions or 3rd party software.
*User is unmasking and/or viewing hidden/protected system files.
*User is removing Read-Only protection on a directory or file.
*User is manipulating SYSTEM.DAT, NTUSER.DAT, INDEX.DAT or any other
registry entries or registry hives.

Does anyone know of such capabilities?

Thanks,
Jason