I think you'll find that there are many programs that will do what you want to do and are available as freeware or shareware. Try these first!

Also, you can get an idea from these free/shareware websites what size download you should expect for a program

Get antivirus protection! I also downloaded a few viruses when I first started with LW. Luckily, my McAfee antivirus software stopped ALL of it.

Good Luck