In Windows Vista, the maximum timeout value accepted is 600 seconds (that is, 10 minutes). So, to configure the system to shutdown in 2 or 3 hours from the current time, you may need to use shutdown.exe in a script or a batch file.

With User Account Control (UAC) enabled in Windows Vista, one needs to open an elevated Command Prompt in order to run scripts under administrative privileges. Although the elevated Command Prompt accomplishes the task, the question How to run as script under elevated privileges, without using the Command Prompt? comes to our mind.

Error "Registry editing has been disabled by your administrator" when opening the Registry Editor in Windows Vista.

This article describes how to clear the Past Items list in the Customize Notifications window.

This article explains how to create a System Restore snapshot manually in Windows Vista.