giogio
4
Ok,
try to run this
http://files.avast.com/iavs9x/avastclear.exe
from Safe Mode (press F8 during boot)
also try from the safe mode to remove this file (c:\Documents and Settings\All Users\Start Menu\Programs\Avast! Endpoint Protection Suite.url) if after using avastclear.exe the file still exist.
I suggest also to use http://it.malwarebytes.org/products/fileassassin if you’re unable to remove it after all the tricks.
Then you can install from new avast and verify if the problems remains or not.