I have ProcessHacker set as my default "Task Manager". When I start ProcessHacker by invoking "Start Task Manager" from the TaksBar, Avast blocks ProcessHacker from loading KProcessHacker.sys: the exact message that Avast displays is:
Blocked by Avast self-defense: kprocesshacker.sys (C:\Program Files\Process Hacker 2\ProcessHacker.exe)
I have attempted to put in an exception for ProcessHacker.exe, but it does nothing. ProcessHacker.exe loads and runs of course, but it does not have the functionality afforded by using the kProcessHacker.sys driver.
A few details: this is on a 32-bit Windows 7 box, just built cleanly today, so nothing on it yet but the OS, Avast, Komodo FW and MS Office.