We've all been there.
You're shutting down your computer after a long day of work, so you press Start, the power button, then go to click Shutdown... only to move your mouse just a bit too much or too little, and accidentally click on that damned restart button. Now we have to wait until the computer reaches the login screen, so that we can shut it down again.
While it doesn't seem to be much of a problem, on older systems with slow HDDs, this sequence can take several minutes, which is quite annoying.
After pressing restart, is there a way to force the computer to only shutdown? Alternatively, when is the safest time to press the power button in order to manually shutdown the computer before it restarts?