This morning Windows Live Messenger started acting like it had become infected after I opened a file from a known contact. All the open message windows closed on their own and IM seemed to lock up. Totally exiting seemed to resolve the immediate issue, but starting it later resulted in similar activity again. I've been running a full system scan of all fixed disks (McAfee Enterprise 8.5) for the past 6+ hours and have not found anything - yet. Was wondering if anyone else saw anything similar today.