Diagnose repeated restarts during boot, after sign-in or under load by checking stop codes, accessories, heat and recent changes.
Try these checks in order
Save work if possible. Complete one check at a time and retest the original symptom. Stop when the issue is resolved.
01Record the pattern
Capture any stop code and note whether lights and fans fully stop or only Windows restarts.
02Check simple variables
Disconnect newly added nonessential accessories and confirm vents are clear. Note whether restarts happen under heavy load.
03Use recovery and diagnostics
If Windows cannot stay on, use the appropriate recovery path and check official diagnostics if stable. Back up important files before advanced repair.
How to read the result
Restarts under heavy load may point to temperature, power or hardware; restarts tied to a specific update or stop code may point toward software or drivers.
The restart timing is a useful clue
A restart during a particular game or heavy workload suggests checking temperature, power and load-related stability. A restart loop immediately after an update or driver change points toward a different line of investigation. If Windows shows a stop code, record it before attempting recovery; do not disable automatic restart just to guess at the cause.
Before changing more settings: Note whether power fully cuts out, when each restart happens, the stop code if shown, temperature warnings, and any recent update or hardware change.
Do not continue testing a device with a swollen battery, burning smell or dangerous heat. Protect data first if storage errors appear.
Model-specific reference note
Windows menus and recovery options vary by version and device. Use the exact Windows version, device model and error message when checking your next step. This guide keeps the diagnostic steps together so you can continue troubleshooting without leaving SafeCode.
Related troubleshooting
- Blue Screen or Windows Stop Code: What to Check First
- Computer Overheating, Loud Fans or Sudden Shutdowns
- Windows Update Failed or Is Stuck: Start With the Code
- Windows error-code library
- Back up before repair
Need help narrowing it down?
Still stuck? Get help choosing the next step
Have the model, Windows version, exact error and steps tried available. Never share passwords or recovery keys.
General information only. Menus and recovery options vary by version and device.