To prevent the Security tab from appearing when a Windows XP user opens the Properties of a file system object:

1. Copy / Paste the following to a NoSecurityTab.reg file:

REGEDIT4

\[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\]
"NoSecurityTab"=dword:00000001

2. Merge the NoSecurityTab.reg file with the registry or run regedit /s NoSecurityTab.reg.

3. The user must log off and on for this setting to take effect.