Why do I need to press F2 to start when I boot up, and why does the time change the time?

Your motherboard's electronic pool is out of power, just change the battery.

Motherboard battery life: All motherboard batteries are CR2032 type, which is universal, the largest coin cell battery, 20mm.

The diameter of the motherboard battery is 20 mm, and it is divided into "CR2016", "CR2025" and "CR2032" models according to the thickness of the battery. Almost all motherboard batteries are 2032 models, so you can just buy them according to this model.

1；The motherboard battery is used whether your computer is turned on or not, and the power is used for some programs in the system, such as the clock in the lower right corner of the taskbar.

2；The life of the battery is related to the model of your motherboard, the quality of the battery and the number of times you turn on and off, generally a new battery life is about 2-5 years, when you find that the computer timing is deviated, it is time for you to change the battery.

3；For batteries that are more than 2 years old (referring to the battery from the factory date), even if the power is normal, open the lid of the case frequently to prevent the electrolyte from leaking out and corroding the motherboard. Personally, it is recommended to replace a new battery of the same model in 2-3 years.

The motherboard electronics are out of power and replaced, try to change it. To press F2 is your BIOS setting problem, set which one to no eerors, see for details.

BIOS settings are explained in detail, if there is still a problem, it may be that the COMS memory is broken, and it needs to be replaced.

The motherboard battery is not enough.

The main version of the motherboard battery is removed.

Get to the place where the appliances are repaired.

Ask those masters to help you measure the battery voltage, and you will know that it should be like this.

Your motherboard battery is broken, just replace it with a good one.

Your motherboard's electronic pool is out of power, just change the battery.

The host battery is dead. Change it, a few dollars.

The CMOS battery is out of power... You go and buy one for a few quick bucks, just 1-2 yuan... Then disassemble the main unit, there is a battery in it, it is the one, you change it to the one in the setting, just set it up (the motherboard is just a battery, don't be afraid of changing the wrong one).

The coms battery is useless, just change the battery.

Buy a pirated disk and reinstall the system.

The BIOS information of the computer motherboard will detect all the hardware connected to the motherboard after booting, and then save the information about these hardware, and each time the computer is rebooted in the future, the BIOS will re-detect the hardware information, and then check the saved information to confirm whether the hardware has changed.

Your situation is obvious, the hardware information detected by your motherboard BIOS cannot be saved, every time you turn on the computer, the BIOS re-detects the computer hardware and finds that it does not match the BIOS information, so there will be a warning prompt for you to "F2" to confirm whether the detected hardware change information has been confirmed by you to protect the computer.

Because you said that it is a newly bought computer, there are 2 cases:

1 There is a coin cell battery on the motherboard, which is used to provide power to the BIOS to save hardware information when the computer is powered off or shut down. It's all possible that this battery is dead.

2 There is a problem with the motherboard itself, because the BIOS is always powered on when your computer is powered on**, and even if the power is cut off for a short time, the information can be temporarily saved. If it's an old computer, that's the only way to do it without affecting your use.

3 Look at the motherboard manual, have you turned off the floppy drive, this is a floppy disk drive. Adopt it.

Replace the motherboard battery. Reinstall the system and restore it. (Reset the BIOS after installation, and the hard disk is the first boot item).

It depends on what your previous question was.

F1 and F2 should have been written before what the reason is.

Generally speaking, it is always said that it is the problem of the motherboard battery or the BIOS time.

This solution is applicable to XP Vista Win7 system.

Problem Description]:

pressf1to

continue，del

toenter

setup）

f2（arive

errorpressf2to

continue,f1

toenter）

Cause Analysis]:

Boot prompt F1 and F2 are generally caused by hardware detection failure or incorrect BIOS information settings, in short, it can be attributed to computer hardware failure, which has nothing to do with the system, so it cannot be repaired remotely.

Tips: If you can't understand the specific meaning of English or have no experience in disassembling and setting up BIOS, it is recommended to contact the computer after-sales service, or choose the nearest computer repair shop for maintenance, so as not to cause unnecessary losses.

Failure Analysis]:

Here are a few common mistakes. (There are many reasons for pressing F1 on boot, you can check the error message above F1 for details).

1.Floppy drive detection failed (This phenomenon is caused by the BIOS not detecting the floppy disk drive.) At present, it is rare to see floppy disk drives in ** machines, and you can directly enter the BIOS to disable the floppy drive). (Figure 1).

Figure 1 Solution:

Go to the BIOS (in this case, Ammann AMI as an example), find the relevant option for the floppy disk drive (and adjust it to None or Disable (i.e. disable the floppy disk drive under the BIOS). Due to the different manufacturers and versions of the BIOS, the method of setting may be slightly different, so the following two examples do not provide a solution, if there is a similar error, it is recommended to consult the motherboard manual, or find a professional to help set up). Figure 2

The time and date settings are incorrect (the detection time is wrong due to a factory reset of the BIOS or a dead BIOS coin cell battery at the time of this failure.) You can go into the BIOS to set the correct time and date, or replace the BIOS battery and reset the date and time). Figure 4

Keyboard detection error (replace or replug the keyboard.) If it is a PS 2, it is recommended to turn it off, cut off the power cord, and plug it back in. Prevent hardware damage. (Figure 5) Figure 5