You should have typed in a password when you set up Mac OSX. You can skip and you probably did but the need for a password keeps stuff from being installed on OSX that you don't want. The reason malware can't embed itself in OSX is there's no registry to write to. Every program goes in the Applications Folder and unless on comes with a dedicated installer/uninstaller, you normally drag the icon out of the virtual mounted drive and drop it in the App Folder and it will auto-install. When you want to get rid of it, you drag the icon out to the Trash, drop it in the can and click Empty Trash Can. *Poof* its gone forever!
(Denny Crane: "I Don't Want To Socialize With A Pinko Liberal Democrat Commie. Say What You Like About Republicans. We Stick To Our Convictions. Even When We Know We're Dead Wrong.")
Thanks. Now I do remember having to enter a password to install apps sometimes. However, with others I just drag them to the apps folder without a password (I think). Is it possible that some of the apps that control workflow, I guess they are setting up macros based on my mouse clicks, etc., have to establish themselves as a user to operate?