I have dual-boot installation of Windows Server 2008 R2 in order to play with Hyper-V. I run it only occasionally and thus I am quite annoyed with shutdown event tracker. While I can understand benefits in normal scenarios, it is quite unnecessary for test installations.
Problem here is that there is no obvious check-box that would disable it. However, Group policy comes to rescue.
Open Start menu and select Run (or hit
Go to "Computer Configuration" > "Administrative Templates" > "System" and on right side you should see “Display Shutdown Event Tracker”. It's common state is "Not configured". That configuration will cause server OS (Windows Server 2008 R2) to display it while client OS (Windows 7) will not.
Setting this value to "Disabled" removes this annoyance.