IE can allow access to parts of your operating system that third-party browsers do not
Thank God for that! This one of the major issues with IE!
Thanks for three good responses. I haven't used Firefox yet because I generally haven't experienced the security problems that others have suffered with IE. Unfortunately, there are too many people who treat their PC like a TV or toaster oven and have absolutely no idea how to maintain their PC and protect against security threats. On a weekly basis, I update and run Adware, Spybot S & D, Spywareblaster (which does a wonderful job preventing spyware/malware from loading in the first place), CWShredder, Cleanup!, and BC Wipe. I also use Norton Internet Security. I rarely have any problems.