Why can't the time be corrected on the computer?

Why can't the time be corrected on the computer?
 

1. Why can't the computer time be corrected?

Like many other computer malfunctions, there is rarely a single cause leading to device errors. The computer time may be incorrect due to the following reasons:

1.1. Dead CMOS battery

Time and date settings for all PCs are stored on the CMOS chip fixed with the device's motherboard. These settings are part of the BIOS, also defining the relationship between all peripheral devices connected to your computer.

BIOS conducts a thorough system configuration check, including date and time, before loading the Windows operating system. The small CMOS battery for BIOS settings remains active even when the PC is turned off. Typically, this battery lasts from 2 to 10 years before replacement is necessary. If the CMOS battery fails, the computer time will freeze at the moment you shut down the PC.

1.2. Incorrect or corrupted BIOS settings

Even after replacing the CMOS battery, the clock may still display incorrect time, especially during startup. In this case, you need to check if the CMOS chip is powered by the battery. It's possible the battery is loose or similarly faulty. A quick fix is to remove the battery and slightly lift the negative battery terminal. Then, press the positive terminal downward before replacing the battery, ensuring a secure connection.

However, if this action fails to address the issue, another possible cause could be a faulty or outdated BIOS. Try resetting the BIOS values, including date and time settings. Alternatively, if the computer is quite old and doesn't automatically update, consider installing a newer BIOS update.

1.3. Time Zone Discrepancy

If your computer clock is set to the wrong time zone, you'll find that even after correcting the time, the clock will still be off in the next startup. Depending on the time zone set, it may even be ahead by a few hours. Refer to how to set the time on a computer here.

1.4. Virus Infection

The final cause of incorrect computer time could be due to a virus or malware-infected device. Malware can target either the BIOS directly or the Windows operating system itself.

2. Solutions to Fix Computer Time Errors

2.1. Synchronize PC Clock with Default Microsoft Time Server

The best way to set up automatic time updates is to synchronize your PC clock with a server. This way, you won't have to constantly correct errors every time you start your computer.

As a Windows PC, the first option you may consider is synchronizing with the Microsoft Time Server. The steps of the synchronization process include:
+ Restarting your computer in Safe mode
+ Clicking on the time tab at the bottom right corner of the screen
+ Clicking on Change and time settings at the bottom of the popup window
+ Clicking on the Internet Time folder, you'll see a small window appear
+ Selecting the time.windows.com server using the downward arrow. Click Update now
+ After clicking OK, a confirmation screen will appear

However, the issue with this solution is that the Internet time won't be updated upon restarting the computer (synchronization only occurs after a certain period of time). Therefore, this isn't a suitable choice if your computer time is incorrect due to a dead CMOS battery.

2.2. Update BIOS

Sometimes, an outdated or corrupted BIOS can be the reason behind your computer's incorrect time. A corrupted BIOS error may result from improper shutdowns, such as directly pulling the power without shutting down the PC first. Proper shutdown habits are the primary method to address this issue.

However, in case your BIOS is outdated, the only option is to update it. Contact your PC manufacturer and find out if there's any available update version. You can also find such information on their website.

Remember to reset or flash your PC BIOS to fix time settings. However, this option comes with many risks. If you're unsure about what to do, consult a professional technician.

2.3. Replace your CMOS battery

If the CMOS battery dies, your PC clock will always be incorrect, and you'll have to constantly update it. The long-term solution is to replace the battery.

In the past, the CMOS battery slot was often embedded in the computer's motherboard, making it difficult to remove and replace the battery. In this case, it's best to take your device to repair shops.

However, with more modern PCs, replacing the CMOS battery is relatively easy (though still challenging with laptops). If replacing it yourself, make sure to properly shut down the computer and disconnect it from power before removing.

2.4. Scan your computer to remove viruses and malware

If after trying all the above solutions your computer time is still incorrect, it's possible your PC is infected with a virus. If you've installed antivirus software, consider upgrading the software.

Additionally, boot and install software in Safe Mode. This way, all unnecessary programs, including malware and viruses, won't be able to run. Then, you can properly scan and clean up your PC without interference from malware.