
Security tab in Windows XP Professional is the important functionality that enable administrators and users to define security permissions and rights for particular users. By default, Windows XP follows recommended setting to enable the use of simple file sharing that hide the Security tab, leaving you with only General, Sharing, Web Sharing & Customize tabs as in the Simple File Sharing UI.
Now just use the following steps:
Launch Windows Explorer or My Computer.
Click on the Tools at the menu bar, then click on Folder Options.
Click on View tab.
In the Advanced Settings section at the bottom of the list, uncheck and unselect (clear the tick) on the "use simple file sharing"check box.
Click OK.
Security tab is available only to...