PC Restarting Randomly? Causes and How to Fix

Computer restarting on its own? Could be overheating, RAM, power supply or driver. See how to identify and fix.

PC Restarting Randomly — Diagnosis and Solutions

Random restarts indicate a serious problem. Let's diagnose:

1. Disable Automatic Restart

To see the BSOD instead of restarting:

Win + R → sysdm.cpl → Advanced tab

Startup and recovery → Settings

Uncheck "Automatically restart"

2. Check for Overheating

Most common restart cause:

Clean cooler and fans

Check thermal paste

Use temperature monitoring (Task Manager → GPU shows temp)

CPU above 90°C = problem

3. Test RAM

Faulty RAM causes restarts:

Search "Windows Memory Diagnostic"

Run and restart

For deeper test: use MemTest86 (bootable USB)

4. Check Power Supply

Weak or faulty PSU causes restarts under load:

If it restarts during gaming or heavy use = probably PSU

Verify PSU wattage is sufficient for your components

5. Update BIOS and Drivers

Outdated chipset and BIOS cause instability

Visit motherboard/laptop manufacturer website

6. Check Event Viewer

Win + R → eventvwr.msc

Windows Logs → System

Look for errors (red icons) near the restart time

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Frequently Asked Questions

PC restarts only when gaming, is it the GPU?

Could be GPU overheating OR power supply can't handle the load. Check GPU temperature and PSU wattage.

PC restarts when copying large files, what is it?

Probably failing HDD/SSD or faulty RAM. Run chkdsk C: /f /r and Windows Memory Diagnostic.