Inside the ComputerOperating Systems

Why Restarting Fixes Things

Turning it off and on again clears what went wrong

Tech support's first question is always the same, and annoyingly it works. What does turning it off and on again actually do?

You'll find out

  • What piles up inside a running device
  • Why some bugs strike on a schedule
  • What a restart will never fix

Why it matters

Knowing what a restart clears, and what it can't, tells you when it's the fix and when it only buys time.

About 3 min6 interactive slides · 5 questionsLesson 102 · Zone 12

Play this lesson

Free to play in your browser or on iPhone

More in this zone

  1. 100Interaction DesignThe Bottomless FeedRemove the bottom of the page and people forget to stop
  2. 101ElectromagnetismWhy Your Microwave Door Has HolesThe holes are too small for microwaves but big enough for light
  3. 103InfraredYour Camera Sees Your TV RemotePoint a remote at your phone's camera and see the invisible light
  4. 104Wave InterferenceSilence Made of SoundNoise-canceling headphones add sound to make quiet
  5. 105SensorsYour Phone Knows Which Way Is UpA microscopic weight on springs senses every tilt
  6. 106ProbabilityPenney's GameLet me choose second and I'll win most coin-flip races
  7. 107AcousticsWhy You Hate Your Recorded VoiceYou normally hear yourself through your own skull
  8. 108NeuroscienceWhy You Can't Tickle YourselfYour brain predicts your own touch and cancels it