Win XP: Security tab
Here is a neat trick from Ram  to enable the security tab in the properties dialog of a folder in WinXP. The security tab is hidden by default in Win XP. You can enable the security tab by following these steps:
1. Open Windows Explorer, and choose Folder Options from the Tools menu.
2. On the View tab, scroll to the bottom of the Advanced Settings and clear (click) the check box next to “Use Simple File Sharing.”
3. Click OK to apply the change, and you should now have a Security tab when viewing the properties of a file on an NTFS volume.