Disable or Remove Shutdown Button

  You can disable or remove the Shutdown button from windows start menu.Just follow the below method.

Start->Run->gpedit.msc->User Configuration->Administrative Templates->Start Menu &Taskbar->Remove Shutdown on Start Menu.->Enable.

Speed Up XP Booting.

Start Registry Editor (Regedit.exe).

Locate the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\Current

ControlSet\Control\SessionManager\MemoryManagement\Prefetch

Parameters

Make sure you backup the keys by exporting them to a .reg file.

On the EnablePrefetcher value, change the setting from 3 to 5 (decimal).

Close the registry editor.

Restart your computer.