Civilization V (through Steam) stops loading. This has just recently started to happen.
The solution is to exclude the Civ 5 directory in F-Secure. Although I shouldn't have to be doing this. A lot of people have experienced this and also confirmed that to exclude the civ map is the answer. I would so love to know if there have been an update on F-Secure that causes this or if an update on Civ that causes F-Secure to not like Civ 5.