You can actually check if there is a service that is slowing down the shutdown of the computer from the Event Viewer.  Then look for the event viewer on the Windows Start menu.  From the menu on the left, switch to the following view: Application and service logs \ Microsoft \ Windows \ Diagnostics-Performance \ Operational.  Right click on Operative, press on Current log filter, type “203” in the “Event ID” field and press OK.  203 is the shutdown event. Now look at the list that should only show events that say “The service caused a slowdown in the system shutdown process” and you can find the name of the culprit service. Obviously there is a problem only if a service causes the shutdown process to slow down every day and if it is not a system service.