"Hi, you're in the right place if your computer keeps restarting itself. I'll go over everything you need to check in the next few minutes, from software problems to overheating, so you can identify the problem and resolve it. Even if you are not a technician, you can follow the instructions and actions in this hands-on, practical guide. Now let's begin.
PC Restarts Automatically — Diagnose & Fix
SECTION 1 — SYMPTOMS & SAFETY
Let's start by defining the issue precisely. Does your computer: • restart at random while doing nothing?
• restart when using a lot, such as when playing games or rendering videos?
• After booting up, restart right away?
• or display a Blue Screen of Death (BSOD) before restarting?
Note the precise moment the restarts occur; this hint frequently indicates the reason.
ON-SCREEN TEXT: "Before opening the case, unplug the power for safety." Work on a surface that isn't conductive.
"Always disconnect power before you open the case," the narrator says in voiceover as they watch someone unplug and open a computer. To prevent static shocks, ground yourself or come into contact with a metal component of the case.
SECTION 2 — QUICK CHECKLIST (ON-SCREEN BULLET LIST
Here is a brief list that we will go over:
- Turn off the system's automatic restart in order to record the BSOD.
- Verify the CPU/GPU temperatures.
- Examine the PSU (power supply).
- RAM test.
- Rollback or update drivers.
- Look for malware.
- Check for Windows updates and fix system files.
- As a last resort, update the firmware and BIOS.
SECTION 3 — DISABLE AUTO RESTART (SO WE CAN SEE ERRORS)
Step 1: To prevent Windows from hiding the error, turn off automatic restart. Here's how:
• To access Advanced system settings, right-click This PC and select Properties.
• Select Settings under Startup and Recovery.
• Click OK after unchecking "Automatically restart."
You will now see a blue screen with an error code the next time Windows crashes. Put that code in writing; it's important.
SECTION 4 — CHECK FOR OVERHEATING
Window for monitoring software (HWMonitor/CoreTemp).
A narrator explains step 2: Overheating. The main cause is high temperatures. HWMonitor or CoreTemp can measure idle and load temperatures. Typical idle CPU temps: 35-60°C; safe under heavy load below 85°C. Model-dependent GPU thresholds are similar.
In case of high temperatures, power down, open the case, and clean the fans and heatsinks.
Make sure all fans spin.
Old or removed CPU coolers require thermal paste reapplication.
• Maintain case airflow: front intake, rear/top exhaust.”
Fans cleaned, cooler reseated.
SECTION 5 — POWER SUPPLY (PSU) TROUBLESHOOTING
“Step 3: Power issues. If your PC restarts or turns off instantly under heavy load (games, rendering), suspect the PSU. Unreliable PSUs can't deliver peak current, causing restarts.
To check: • Use a compatible spare PSU and test it temporarily.
• Try reducing your system to one stick of RAM, CPU, and integrated graphics to see if the problem persists.
• Check PSU or motherboard capacitors for bulging or leaking.”
Screen text: “If you’re not comfortable testing PSUs, ask a technician — PSUs hold dangerous voltages.”
SECTION 6 — MEMORY (RAM) TESTS
Step 4: RAM failure. Unexpected restarts and crashes are common with bad memory. Test with Windows Memory Diagnostic or MemTest86.
To run the Windows Memory Diagnostic test, press Win+R, type mdsched.exe, and restart.
• Create a MemTest86 USB and run multiple passes for a thorough check.
Reseat RAM sticks and test one at a time to find a failing module.”
Resetting RAM and running mdsched.
SECTION 7 — DRIVERS & SOFTWARE
"Step 5: Software and drivers. Restarts may be caused by a corrupted driver, particularly a GPU driver. Take this action:
• To check if restarts cease, boot into Safe Mode. It's probably hardware if they don't.
• Update GPU drivers from the official websites of Nvidia, AMD, and Intel; if the problem started after an update, revert to a previous driver; • Remove newly installed hardware-interacting apps or utilities (overclocking tools, monitoring software).
ON-SCREEN: Device Manager and driver updates are displayed.
SECTION 8 — WINDOWS SYSTEM CHECKS
"Step 6: Verify updates and fix system files. In an elevated Command Prompt, execute these commands:
Sfc/scannow DISM /Online /Cleanup-Image /RestoreHealth
Corrupted system files are fixed by these commands. Additionally, review the Windows Update history and remove any updates that appear at the beginning of restarts.
ON-SCREEN: Typing and executing commands.
SECTION 9 — MALWARE SCAN
Malware is the seventh step. Certain malware leads to instability. After doing a thorough scan with Windows Defender, get a second opinion from Malwarebytes. Restart after completing the removal procedures if malware is discovered.
SECTION 10 — BIOS, FIRMWARE & OVERCLOCKING
Step 8: Overclocking and BIOS/UEFI. Return to the default clocks and voltages if your CPU or GPU has been overclocked. Stability problems can occasionally be resolved with a BIOS update, but be cautious—flashing the BIOS can be dangerous. Update the BIOS only if the manufacturer's notes include fixes that are pertinent to your issue.
"Make a BIOS backup and follow manufacturer instructions" is the on-screen text.
SECTION 11 — WHEN NOTHING WORKS
“If you’ve tried everything and the PC still restarts:
• Try a minimal hardware setup to isolate the failing component.
• Consider professional diagnostics — particularly for intermittent PSU or motherboard failures.
• If your PC is under warranty, contact the manufacturer before opening the case.”
[OUTRO — ON SCREEN: “Like and Subscribe / Ask for personalized help”]
“Thanks for watching — fix that restart, and get back to smooth, reliable computing. If you need a step-by-step script to follow with your exact PC model and symptom timeline, paste the details below, and I’ll customize it for you.”
[END CARD: Resources / Commands to Paste]
ON-SCREEN TEXT:
“Helpful commands to run and paste here:
• sfc /scannow output
• Any BSOD error codes (e.g., DRIVER_IRQL_NOT_LESS_OR_EQUAL)
• CPU/GPU temps at idle and load
• Recent hardware or driver changes.”
Resources / Commands to Paste
USB Detected But Not Opening? Easy Fixes for Windows USB Issues - KasutechTips
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