After the computer is turned on or running for a period of time, the system time automatically chang

There are only three possibilities for computer time inaccuracy:

1. The motherboard battery is dead.

2. There is a virus.

3. There is a problem with the motherboard.

Corresponding workaround:

1. Replace the motherboard battery, the model is CR2032, a button-shaped lithium battery.

2. Antivirus. 3. Send the motherboard for repair or replacement.

Let's talk about how to judge these three situations:

If the time cannot be modified under Windows, or it jumps to an incorrect time just after the modification, then it must be poisoned;

If the time can be changed under Windows, but the time is wrong after the restart. Then re-modify the system time, restart the computer, enter the BIOS to check the time displayed in the BIOS, if this time is wrong, it means that the motherboard battery is dead or the motherboard has a problem. If the time is right at this time, and the time is wrong after entering Windows, it means that it is a virus.

If the BIOS time is wrong, and the problem is still not solved after replacing the battery, then it is the fault of the motherboard, usually a very small chip, a capacitor or a circuit has a problem, just send it for repair.

It's still toxic on the computer, and it's not in the disk where the system is installed, and it's not your system installation disk that is poisonous.

Have you turned on the time protection of the antivirus software, which will lead to the problem that the time cannot be changed.

If you are sure to rule out viruses or system issues, the motherboard battery is dead.

Rogue software to clean it up.

The reason why the system time always returns to the same default value every time you boot on is because the motherboard CMOS battery is dead, and you only need to replace the battery.

The COMS battery is the backup power supply battery of the COMS chip on the computer motherboard, which is mainly used to save the hardware configuration of the current system and the operator's setting of certain parameters, so as to ensure that the BIOS information will not be lost whether the computer is in a shutdown state or encounters a system power failure. When the battery is dead, some artificially set options will not be saved, such as time, date, etc., will be restored to the factory BIOS default.

The coin cell battery on the motherboard is dead.

There may be one of the following reasons why your computer automatically restarts

1. Computer heating may lead to restart, it is recommended to install Master Lu to monitor temperature changes, if the temperature becomes high and restart, then it is a heat dissipation problem, it is recommended to disassemble the machine to remove dust, and replace the processor heat dissipation grease, etc.

2. If there is no problem with heat dissipation, then it may be a system problem, such as software conflict or virus factors, it is recommended to restore the factory system or reinstall it.

3. If the system cannot be solved after restoring the system or reinstalling, then it may be a hardware failure.

Voltage problem!

Maybe 5 to 6 o'clock in the evening is the peak time for electricity consumption, the voltage is low and the computer starts up so it will shut down.

In my judgment, there are two possibilities.

1.Power supply. Most likely, it was during that time when your electricity consumption was at its peak, and the voltage was unstable.

If you can, take a UPS to try.

2.Virus. This is less likely. Find a better antivirus software to kill.

It is recommended to start with the power supply, check the voltage in the room, or the power supply of the computer.

First of all, it is suspected that the power supply is broken, because when the computer presses the power button to turn on the power, it will first send a PG signal to the motherboard, and then the CPU will generate a reset signal to start the self-test, and then boot the operating system in the hard disk to complete the computer boot process. And the PG signal Suikai is relatively close.

There is a delay of about 4ms for the 5V supply voltage, and the computer is started only after the voltage is stable. If the PG signal delay is too short, the power supply will be unstable, and the CPU will not be able to generate a reset signal, causing the computer to fail to boot. When it is rebooted, the supply voltage has stabilized, and the computer starts up normally.

It seems that the fault originates from the power supply, and it is rebooted for testing and troubleshooting after changing a power supply.

If the power supply is normal, consider whether there are some capacitors on the motherboard, or it may be caused by the poor operation of the cup fan or the solidification of the lubricating oil due to low temperature, and another reason is the aging of the hard disk.

Use hardware exclusion.

Find a friend's host.

Then remove the hardware from your machine.

Put one on a friend's machine instead of your friend's hardware.

If it is normal, restore the friend's machine.

Then try your next piece of hardware.

Although it is troublesome, it is guaranteed to be 100% able to find out the cause of the failure.