The most common causes of a computer freezing and restarting are virus infections, operating system failures, or insufficient RAM.
The reason is a virus
First you need to check your computer for viruses. Use the installed antivirus program and scan the entire computer. In the event that you doubt the effectiveness of the installed antivirus, it does not hurt to reinstall and apply a more reliable option. The rating of antivirus programs is compiled annually, covers almost all noteworthy products and is published on the Internet. If the version of the virus infection is not confirmed, but the computer still freezes and randomly reboots, then you should conduct a consistent check of the hardware.
The reason is a breakdown in the hardware
Start your hardware test by examining the health of your RAM. For this, the amount of free memory registered in the item "Physical memory" of the "Task Manager" should not be less than 20% of the total volume. In the event that there is less free memory, then it is necessary to increase the amount of computer RAM or constantly monitor that applications unnecessary for operation are disabled. Forced shutdown of processes is performed through the "Task Manager".
The reason is a failure in the operating system
In the absence of a shortage of RAM and viruses, the effect of "freezing" and rebooting can be caused by a failure in the operating system. The situation can be corrected only by reinstalling or restoring it. Before you start reinstalling or restoring, make sure that all information from drive C is backed up to either external drives or drive D.
In addition to the listed, most common causes of freezing and rebooting, such consequences can be caused by a faulty power supply, defects in system unit components, and damage to the motherboard. Overheating of the processor or video card is a real scourge of modern computers and, especially, laptops. The desire of manufacturers for compactness turns into a sensitivity of machines to external temperatures. Therefore, if your computer malfunctions in the summer, chances are high that this is a consequence of overheating. To monitor temperature conditions, you can use special software applications available on the Internet. Such programs allow you to monitor changes in temperature on the main components of the computer. In this way, it is possible to identify what kind of hardware stress coincides with freezing and rebooting.
It can be very difficult to determine what exactly failed in these nodes. Therefore, most often they are changed to new ones. The best way out is to contact a service center to diagnose the malfunction and further repair the computer.
