The past few days I've been dealing with access-control lists (ACLs) quite a bit. These things aren't the simplest in the world, so the Security tab that's available in the file Properties window (right click a file or folder and select Properties), really comes in handy. It provides access to Windows' built-in ACL viewer and editor, a tool that let's you see exactly what users and what groups are granted/denied access to any file or folder on your system, as well as a lot of other good stuff.
However, if you're using Windows XP Home Edition, this tab doesn't exist in the file Properties window unless you boot into Safe Mode. Anyone who's been in Safe Mode -- i.e, "bare-bones mode" -- knows that while it can be useful, it's definitely not a good environment to do your daily activities in, and who wants to reboot their system every time they want to look at or edit the ACL of a file or folder?
So after booting in and out of Safe Mode a few times, I finally Googled and found that you can "unhide" the Security tab in the file/directory Properties window by downloading and installing Microsoft's free Security Configuration Tool.
After you download, just extract the contents to the location of your choice, right click setup.inf and click Install, and once everything is complete, you should be good to go.