Megroy, welcome to the windows 7 forum.
(that is an L instead of an I in the name)
The file icacls.exe is an system tool that will do a lot. I suggest that you look in your windows\system32 directory
and type
icacls.exe /? to get the help file on the program,
There is always the possibility that some program is trying to change access permissions to files/directories.
I assume that you have a good Anti-Virus program like malwarebytes
available for free at malwarebytes.org
Rich