Hi. . .
A very good question indeed.
No, there is no reason for concern unless you are experiencing system problems.
XP had 3 basic Event Viewer logs; Vista had ~175; Windows 8.1 has 275 Event Viewer logs, etc... - they add more logs with each new OS.
You would literally drive yourself nuts trying to figure out every entry. I have no idea what many of the entries refer to as not only are Windows OS related events recorded, but events related to 3rd party apps can be recorded as well. I only look through the Event Viewer logs if I am encountering system trouble.
I would suggest that you forget about the Event Viewer logs and occasionally review/take a look at the Reliability Monitor. But even that will report events as Errors or Critical that you need do nothing about.
Regards. . .
Edited by jcgriff2, 05 September 2015 - 03:59 PM.