I have Lookout but no task killer. I've cleared the call log. This started 12/3/12 and the only thing that I was trying to do was to transfer data to my husband's phone and turned the S Beam on but since have turned that off. There hasnt been any new apps added during the this time period.
Check out a fun infographic that teaches you how to increase storage, enhance security, improve battery life and clean your device.