How to Fix Computer Randomly Restarts on Windows
PC restarting by itself without warning? Fix random reboots caused by overheating, driver crashes, power issues, and Windows errors.
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Main Troubleshooting Guide
How to Fix Computer Freezing and Hanging →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •PC restarts without any warning or error message
- •Restart happens during gaming or heavy workloads
- •Random reboots at idle or low usage
- •Blue screen flashes briefly before restart
- •PC restarts multiple times a day
- •Restart happens at the same time daily (scheduled updates)
Common Causes
- ⚠CPU or GPU overheating triggering thermal shutdown
- ⚠Unstable power supply under load
- ⚠Driver crash causing automatic restart
- ⚠Windows Update set to auto-restart
- ⚠Faulty RAM causing random crashes
- ⚠Overclocked components unstable
Solutions
Solution 1: Disable Automatic Restart on Failure
- 1Right-click Start > System
- 2Click "Advanced system settings"
- 3Under Startup and Recovery, click Settings
- 4Uncheck "Automatically restart" under System failure
- 5Click OK — next crash will show the blue screen instead of restarting
- 6Note the stop code to diagnose the root cause
Solution 2: Check Temperatures
- 1Download HWMonitor or Core Temp (free)
- 2Run the program and check CPU temperature
- 3Under load, CPU should stay below 85°C
- 4If temps are high: clean dust from fans and heatsinks
- 5Ensure all case fans are spinning
- 6Consider replacing thermal paste if CPU is 5+ years old
Solution 3: Disable Automatic Update Restarts
- 1Go to Settings > Windows Update > Advanced options
- 2Turn on "Notify me when a restart is required"
- 3Set Active hours to your working hours
- 4This prevents Windows from restarting during use
- 5You can also temporarily pause updates if needed
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