Signoff

 Installing Signoff will prevent unintended Shutdowns/Restarts/etc, plus it gives an automatic countdown. The option chosen will be highlighted and chosen in the set amount of time (default is 30 seconds). This is a must have software for servers, where administrators never have to be concerned with choosing the wrong single-click option on Windows 2008/2008R2. Windows XP/2003 also benefit by getting the ability to single-signoff.

Prevent unintendedly choosing another option (i.e. Restart instead of Logoff)
Keep a single click Shutdown/Logoff/etc but still have a chance to cancel the option chosen.
Modify the automatic countdown wait time.
Signoff comes in two version, a free version, Signoff Free, and Signoff. Signoff Free is unable to hide the tasktray icon or use Group Policies.