OS: Windows 7 64-bit
Product: Bitdefender Total Security
Other Security Software: Malwarebytes Anti-Malware Premium, SUPERAntiSpyware Professional Edition
Bitdefender doesn't automatically create a rule for TrustedInstaller. The following shows up in the "Network Activity" -> "Show Log":
[bDFWCORE] Open process 4294967295 - c:\windows\servicing\trustedinstaller.exe failed. Error: 57.
I had to add the rule myself. This is weird as this is the .exe that exhibits this behavior according to the log.