If your PC is automatically restarting again and again, the most common causes are overheating, faulty or incompatible drivers, corrupted system files, power supply issues, or incorrect Windows settings. You can fix this by checking temperatures, updating drivers, disabling automatic restart, and repairing Windows system errors.
An automatically restarting PC can be alarming, especially when it happens without warning. In some cases, Windows restarts immediately after startup, while in others it reboots randomly during normal usage.
This problem is often triggered by hardware safety mechanisms, such as overheating, or by software issues like driver crashes and system file corruption. Windows may restart to protect your hardware from damage.
Understanding the root cause is essential to applying the correct fix and preventing future restarts.
Pay attention to when your PC restarts:
This helps determine whether the issue is related to hardware stress, drivers, or system configuration.
Overheating is one of the most common reasons a PC restarts automatically. When the CPU or GPU temperature rises beyond safe limits, the system shuts down or restarts to prevent damage.
If restarts happen during gaming or heavy tasks, overheating is very likely the cause.
A faulty power supply unit (PSU) or unstable power source can cause sudden restarts, especially in desktop PCs.
Laptop users should test with the original charger only.
Windows is set to automatically restart when a critical error occurs. Disabling this option helps identify the exact error message.
After disabling, Windows may show a blue screen error instead of restarting.
Faulty or incompatible drivers can crash the system and cause automatic restarts. This often happens after Windows or driver updates.
Focus on graphics, chipset, and network drivers first.
Corrupted Windows system files can lead to instability and unexpected restarts.
Malware can cause system crashes, forced restarts, and instability.
Restart the PC after cleaning.
Faulty RAM can cause random restarts without warning.
If errors are found, replacing the faulty RAM is recommended.
Some software, especially system utilities and overclocking tools, can destabilize Windows.
Windows updates often include bug fixes and stability improvements.
If none of the software fixes work, hardware failure may be the cause.
Professional diagnosis is recommended in these cases.
This usually happens due to overheating, power issues, or driver crashes.
Yes, incompatible or corrupted drivers are a common cause.
Repeated restarts can damage hardware if overheating or power issues persist.
Last updated: January 2026 • Techfix&Guides