Avast Premier include Trojans

I use Avast Premier and for the second time IObit Malware Fighter / Bitdefender found Avast Premier by two Trojan but can not eliminate them.
First time i uninstall Avast and load new same version from Avast website and that include trojan allready.
My next virus protection software is Kaspersky,goodbye Avast.
Harry

You don’t give much information:
What was the file name and location ?
What was the malware name given on the detections.

This really is a common issue, scanning other security programs with another security program.