Help ! AVAST is blocking Roguekiller, after it starts its disk scan. See screen shot attached for AVAST pop up message, wherein it flags something called kprocesshacker.sys on the path to Roguekiller64.exe. I’ve tried removing and re-installing both AVAST and Roguekiller, but the problem remains.
when rougekiller start it will try to kill all process so a security program like avast of cours dont like that as that would be something malware would try to do
I believe there has been a fairly recent post about this, roguekiller https://forum.avast.com/index.php?topic=186902.0. The last comment is by one of the avast team on why it is blocked.
The Viruses and Worms forum is really where this topic should be.
any special reason why you run rougkiller?
turn off avast selfdefence and try again 
If you need assitanse with malware removal > https://forum.avast.com/index.php?topic=53253.0
+1 on this 
it seem’s that it’s because RogueKiller does infact kill all processes during its scanning process. Nothing to worry about.