A frozen app, a computer that stops responding, and a computer that restarts by itself can look similar but point to different problems. The most useful first step is to record exactly what happens, when it happens, and whether the same task brings it back.
Record the pattern before changing settings
Notice whether one program freezes or the entire computer stops responding. Write down the task you were doing, how long the computer had been on, and whether you saw a spinning symbol, blank screen, stop code, or message after the restart.
Take a photo of an error before it disappears. Also note whether the problem began after a system update, new program, new accessory, drop, spill, outage, or other change. A repeated pattern is more useful than a guess about the cause.
- The exact program or task in use when the problem starts
- Any error, stop code, or restart message
- Whether the keyboard, pointer, sound, or screen still responds
- Anything installed, connected, or changed shortly beforehand
Protect open work and important files
If the computer responds, save open work and use its normal restart command. A forced shutdown can lose unsaved changes, and repeating forced restarts can interrupt an update or make a storage problem harder to assess.
When the computer is stable enough, make or check a separate backup of important photos, documents, and business files before attempting a major update, reset, reinstall, or hardware change. Confirm that the backup reports completion and spot-check a few copied files. A spot check does not prove that every file can be restored.
Compare one simple change at a time
If the problem began after connecting a nonessential external device, shut the computer down normally and test without that device. If only one program freezes, check that program's official support and available updates before changing the whole computer.
Low storage, unfinished updates, incompatible software, unwanted programs, overheating, memory problems, and failing hardware can produce overlapping symptoms. Avoid downloading a cleaner, driver updater, or security tool from an advertisement or unexpected warning. Check the cause before buying a part.
Stop when the symptoms may involve damage
If you see smoke, sparks, flame, hissing, or rapid heating, move away, get everyone to safety, and call 911. Do not touch, move, charge, or unplug the device. For swelling, unusual heat, a burning smell, or liquid exposure without those active signs, stop using it and disconnect power only if you can do so safely.
Repeated restarts with the same error, clicking or grinding sounds, missing files, failure to reach the normal sign-in screen, or a freeze during every startup deserves a careful check. If irreplaceable files are involved, mention them before repair or recovery steps begin.