Troubleshooting Guide

If your desktop computer restarts automatically without warning, it may be caused by hardware issues, software errors, overheating, or power problems. Follow the step-by-step troubleshooting guide below to identify and fix the issue.

Common Causes of Automatic Restart

A desktop may restart automatically due to the following reasons:

• Overheating of CPU or motherboard

• Faulty RAM or hardware component

• Power supply problems

• Windows update or driver conflicts

• Virus or malware infection

• System crash (Blue Screen Error)

• BIOS configuration issues

Step-by-Step Troubleshooting

1. Check for Overheating

Overheating is one of the most common reasons for automatic restarts.

Steps:

1. Turn off the computer.

2. Check CPU fan and cabinet cooling fans.

3. Remove dust from inside the cabinet using compressed air.

4. Ensure proper airflow around the desktop.

5. Restart the computer and monitor temperature.

Tip: If the CPU fan is not spinning properly, it may need replacement.

2. Check Power Supply (SMPS)

A faulty power supply unit (PSU) can cause unexpected restarts.

Steps:

1. Turn off the system and unplug power.

2. Check power cable connections.

3. Test with another power cable or UPS outlet.

4. If problem continues, test with a different SMPS.

3. Disable Automatic Restart in Windows

Sometimes Windows restarts automatically when it encounters a system error.

Steps:

1. Right click This PC.

2. Select Properties.

3. Click Advanced System Settings.

4. Under Startup and Recovery, click Settings.

5. Uncheck Automatically Restart.

6. Click OK and restart the computer.

This will help identify if the system shows a Blue Screen error.

4. Check RAM (Memory)

Faulty RAM can cause system instability and random restarts.

Steps:

1. Turn off the computer.

2. Remove RAM from the motherboard.

3. Clean the RAM contacts gently.

4. Reinsert the RAM properly.

5. If multiple RAM sticks are installed, test them one by one.

5. Scan for Virus or Malware

Malware can also cause system crashes and restarts.

Steps:

1. Update your antivirus software.

2. Run a full system scan.

3. Remove detected threats.

4. Restart the computer.

6. Check Windows Updates and Drivers

Outdated or incompatible drivers may cause restart issues.

Steps:

1. Open Windows Update Settings.

2. Install all available updates.

3. Update motherboard, chipset, and graphics drivers.

4. Restart the system after updates.

7. Check BIOS Settings

Incorrect BIOS configuration can cause restart loops.

Steps:

1. Restart the computer.

2. Press DEL / F2 to enter BIOS.

3. Select Load Default Settings.

4. Save and exit BIOS.

8. Check Hard Disk Health

Hard disk errors can cause system crashes.

Steps:

1. Open Command Prompt (Admin).

2. Run the command:

3. Restart the system to scan the disk.