Random computer restarts can stem from overheating, power supply issues, or software corruption. Overheating is a frequent cause, especially in older computers or those in warm environments. Check if the internal fans are running and clean any dust that may have accumulated around the vents. Installing a temperature-monitoring tool can help you monitor your system’s heat levels. If your computer’s power supply is faulty or insufficient, it may struggle to power all components consistently. Testing with a higher-wattage power supply can rule this out. Software corruption or recent updates can also lead to restarts, so try uninstalling recent updates or restoring your system to a previous restore point. Running a full virus scan is another step, as malware can cause unexpected restarts. As a final measure, reinstalling the operating system can resolve deeper software conflicts.