S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464 is the SID of the Trusted Installer (NT SERVICE\TrustedInstaller). S-1-5-80-… is the prefix for all SIDs that represent a service).
The Trusted installer is sometimes abbreviated with TI (for exmple in the output of cacls.exe).