The chemical energy in food is transformed into mechanical energy through a process called respiration. This isn't really a computers and technology question though. Try Biology next time.
A server stopped provide service to 100 users
Of the different freeware and shareware programs available, two of the most popular are Xteq X-Start from Xteq Systems, and Startup Control Panel by Mike Lin. X-Start is a full-blown tweaking utility thats free for non-commercial use, and enables you to edit just about every element of a Windows system, including relevant startup and shutdown settings.