On downloading some free games, my virus scanner starts alerting me to a trojan in Celestia msvcm90.dll (TR/Dropper.Gen).
Granted, odds are it's a false positive, but it's the first time I've had a false-positive on game downloads, and I use Origin, Steam, and NCSoft.
You might want to look into what is causing that, since that should be a standard Visual C dll file.