The Shutdown Tracker is used to maintain computer shutdown/restart reasons history. But this feature is irritating for IT peoples so if you don’t want this future so just disable this from gpedit.
Step by Step
Click on Start -> then click on Run
In Run input box type gpedit.msc
In Group Policy consol click on + Computer Configuration and then click on + Administrative Templates and under the System find Display Shutdown Event Tracker in right penal.
Double click on Display Shutdown Event Tracker and set it to Disabled, then press OK