Rockwell Automation FactoryTalk Historian SE 4.0 Installation and Configuration Guide - Manual (Page 62)

Chapter 4 Post-Installation Tasks
62 Rockwell Automation Publication HSE-IN025A-EN-E–September 2013
By excluding these directories you avoid random signature match
incidents, potential performance impacts, and conflicts with locked
files.
NOTE
For more details, see the FT Historian SE Server Reference Guide, available
in the Redist\Docs folder on the FactoryTalk Historian SE installation
DVD and in the Common Files\Rockwell\Help folder in your Program
Files directory.