What's your definition of slow? Modern-day games are like 5-10 gigs, which is steep. Some games go out to like 30 gigs and have to fit into 2 DVD-9s. For some other tips to make your download faster:
Make sure your PC is the only one doing intense downloading on your network.
Connect your PC through a wired connection, which is always faster than Wi-Fi.
Stop other programs that could be downloading crap such as Bittorrent and GNUtella clients, Steam, Youtube, etc.
Or you know... upgrade your connection speed.
Go into your Gamefly client and reinstall the game through there. Also, it's generally not recommended to use any sort of paid antivirus program. Just use Microsoft Security Essentials and MalwareBytes and you'll be fine.