As Menaceman said, it's likely not from any sims CC. Although, if you're on some sketchy sites it may be. Some sims sites are really haphazard, you need to pick and choose what sites you think are good.
Also, as Menaceman said, scanning everything before you open is good. AVG works well, and I'd also suggest Norton Antivirus (which isn't free).
I had Norton on my old computer, and that thing was like a steel door to the viruses.
Good luck and happy simming. <3