Disable the logon and logoff buttonTag(s): WinAPI/Registry

1. Locate the registry entry HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer.
2. Right-click the Explorer key, and select New | DWORD value.
3. Name the value StartMenuLogoff
4. Type 1 in the Value Data text box
5. Right-click the Explorer key, and select New | DWORD value.
6. Name the value NoClose
7. Type 1 in the Value Data text box
8. Close the Registry Editor.
9. Reboot