There are many. Unless the manufacturer decided to radically change their stance, one big weakness is it can't detect or remove the malware that pretends to be an antivirus program. See: »www.bleepingcomputer.com/virus-r ··· rus-2013
for information on that family of malware. That link is just the newest version. There are many prior versions of the same virus that were not detected by Telus Security.