Since he has XP, he can do a batch program and start it with an icon. This would force all running programs to shut down.
Right-click the desktop, and chose New -> Shortcut. Copy the code below in the target box, name the target whatever you want, and click apply. You can even right-click, properties, and change icon to make it look like a power button
directions for
shutdownCODE
%windir%\System32\SHUTDOWN.exe -s -t 01
directions for
restartCODE
%windir%\System32\SHUTDOWN.exe -r -t 01
The difference between them is -s is for shutdown, and -r is for restart. The -t is for time, in seconds.