There are several reasons why computer time gets lost. However, the elimination of such a malfunction in most cases is quite affordable for the average user, of course, if you know what to look for.
Independent power supply
Perhaps many will be surprised to learn that a battery is located on the system board. Its purpose is to save custom BIOS settings and to support the course of the electronic clock integrated into the chip in the absence of external power. In fact, this is obvious: the clock can either start or use some external source of energy. Thus, if the time on the computer constantly gets lost, then it's time to change the battery to a new one.
Replacement
Find it on the motherboard is not difficult: a shiny disk the size of a five-copeck coin everyone will notice. All work must be done with the computer's power cord removed from the outlet. Gently prying off the top contact with a small screwdriver, you need to remove the CR 2032 battery. After that, it is useful to clean the contacts in the connector with an eraser, and “walking” through the new battery will not be out of place.
We recommend that before installing a replacement, check the voltage of this power source with a multimeter - it must be at least 3 volts. After installing a new battery, you will have to re-configure the BIOS (to enter, you must often press the Del button immediately after turning it on). After that, that time gets lost on the computer, you can forget for several years.
Nuances
Although the vast majority of boards use a standard battery, some manufacturers have gone the other way. So, a sufficiently capacious capacitor can act as a power source . In addition, sometimes the battery is closed by the housing in a single unit, so it is not possible to find it without a thorough inspection of the elements. However, there are only a few such boards.
Hardware malfunction
In rare cases, even after replacing the battery, the user notices that the time on the computer is lost. In this case, it is recommended to clean the contacts and battery more thoroughly (at 3 V even a thin film of grease on the metal can cause a significant voltage drop). It is also worth making sure that the contacts have not come off and their clamp has not decreased.
Lost time on the computer: Windows 7
As we indicated at the beginning of the article, the causes of the failure can be different. For example, many users forget that if time gets lost on the computer, then, quite possibly, the settings of the operating system and related programs are “to blame”. For example, if you set the time and date in Windows, then they will be saved in the BIOS. It follows that if the time zone is set inaccurately and background synchronization is enabled, then after each boot of the system, the time on the computer will be set automatically in accordance with the data received from the server. At the same time, any attempts to adjust the time through the BIOS of the motherboard will fail to be insufficiently effective, since after the first boot of the system the clock will be lost again. We recommend disabling synchronization altogether. This can be done through Start: Control Panel - Set the date and time - Time on the Internet.