Computer Randomly Shuts Down
The computer switches off entirely without warning, requiring you to turn it back on manually, as opposed to restarting itself automatically.
Quick answer: A computer that shuts off completely (rather than restarting) is more often a thermal protection response or a power supply issue than a software problem — the computer is protecting itself from damage rather than crashing. It's worth taking seriously rather than just turning it back on and continuing.
Likely causes
- Overheating triggering an automatic thermal shutdown to protect the components
- A power supply that's failing or can't sustain the load, especially under demanding use
- A power outlet or board issue rather than the computer itself
- In rarer cases, a failing motherboard component
What you can safely check yourself
- Feel whether the case is unusually hot after a shutdown, and check the vents and fans aren't blocked or clogged with dust
- Note whether shutdowns happen more under heavy use (gaming, video editing) which points towards heat or power supply strain
- Try a different power outlet to rule out an external power issue
When it needs a proper look
If shutdowns continue after checking airflow and power, that points to a genuine hardware fault — power supply and cooling issues both get worse over time if left unaddressed.