avast won'T delete

I installed avast familiale, it won’T start,show me this message

c/programesfiles/alwil software/avast4/ash.avast.exe n’est pas une application de win32 valide

Ok so I tryed to remove it, with programe supression…nothing…tryed with avast supression utility…nothing…even went to La Taniere du PN and tryed to remove it manuelly…nothing…can someone please help.

the avast setup (or extracted files) was corrupted… it could be a Beagle infection… use search and follow the advices in other Beagle related threads…