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A computer can automatically restart due to software or hardware issues, such as critical updates, software crashes, driver crashes, or hardware failures. It’s possible to postpone or disable automatic restarts, but it varies by operating system. Overheating components, power supply issues, and dust can also cause automatic shutdowns.
A computer can automatically restart due to software problems or hardware failure. A common cause of an automatic restart is when an operating system (OS) has downloaded a critical update that needs to be applied immediately. Other automatic restarts may be due to software crashes, in which case a screen may appear to indicate the error. A computer can also automatically restart due to hardware failure, such as a problem with the central processing unit (CPU), graphics processing unit (GPU), or power supply unit (PSU). Inoperative fans, poor contact with the heat sink, or excess dust can generate enough heat to cause a shutdown.
Some operating systems are designed to automatically restart when a critical update or patch has been downloaded and is ready to install. The operating system may offer the user an option to postpone the restart, although it is usually not possible to disable the process. It is often possible to disable automatic restarts altogether, although the process varies from operating system to operating system and even between versions. Sometimes it’s an option in the update manager, although in other cases more advanced techniques are required, such as editing the registry.
Other reasons for software to restart a computer automatically are usually related to an error of some sort. A driver crash can cause an automatic restart, although any number of other errors can as well. If a computer restarts automatically on a regular basis, there could be some type of virus or malware. In this case, it may be a good idea to run a variety of different programs to detect the presence of malicious software.
Hardware errors can also cause a computer to restart automatically. If your computer has a way to monitor the temperature of components, such as the random access memory (RAM), CPU, and GPU, this is a place to start investigating. These temperatures can be observed to determine if one is abnormally high at the time of an automatic restart, in which case that component is the likely culprit. A bad heat sink or malfunctioning fan can cause some of these components to overheat, although the component itself may require replacement.
A power supply can also cause a computer to shut down if it doesn’t supply enough electricity to the various components. This situation often occurs after installing new components because advanced video cards and other upgrades can draw a significant amount of power. It’s also possible for a power supply to stop working properly due to age or failure of internal components. Dust can also create excess heat in power supplies as well as various other parts of a computer, which can lead to automatic shutdowns or premature component failure.
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