Most of our lab computers are reimaged nightly, which means all of the Windows/IE annoyances recur every time I'm using the computer in front of the class: "there are unused icons on your desktop!" "do you want phishing protection?" "should I save your password?" "do you want to turn on auto-complete?" "please wait 10 minutes while Visual Studio initializes settings" etc. Today I likened it to the film Groundhog Day – from the perspective of Windows, every pop-up question is fresh and helpful; it's me who is stuck in the time loop. :)