strange untrusted files in norton insight

I am using windows XP

 

aand in norton insight some microsoft and even symantec files are not trusted.

 

 

i think it are files that many users have but still why are they not trusted, or how do i get the right files.

 

 

in particular it  is about the following files

 

Microsoft

services.exe  proces id 1304 version 5.1.2800.5755

 

 

Symantec

c:\program files\norton internet security\engine\16.7.2.10\ccsvchst.exe

version 108.1.1.10

 

i guess every XP user has them but why are they not trusted or are they really infected?