Hive: HKEY_LOCAL_MACHINE
Key: Software\Microsoft\WindowsNT\CurrentVersion\Winlogon
Name: EnableQuickReboot
Type: REG_SZ
Value: 1 enable

This enables a quick reboot using keystroke command Shift-Alt-Ctl-Del which uses the same API as the Resource Kit utility shutdown with the /C parameter. This forces open applications to close immediately which can cause loss of data. Not recommended.

Related Tips:

Shutdown at specific time each day
Reboot NT nightly - shutdown.exe
PC PowerDown after Shutdown in NT
Remotely Shutdown Windows NT Workstation or Windows NT Server

title says it all