PC Time Changes to Unrealistic Future Dates (e.g., Year 2400, 3400)

Question

Hello,

Currently, the time on my PC often changes to dates like the year 2400 or 3400.

Our internal network environment is a closed network that is not connected to the outside, and there is a separate NTP server. All PCs synchronize their time with the NTP server.

Most PCs receive the correct time by synchronizing with the NTP server, but some PCs experience sudden and abnormal time changes to dates like 2400 or 3400.

The event logs for PCs with abnormal time changes show the following log entry: "System time synchronized with the hardware clock."

I have also replaced the CMOS battery, and it is functioning correctly.

I have the following questions:

Why does the time change to unusual values when the PC is communicating properly with the NTP server and synchronizing with the hardware clock?

When the time is changed in Windows, does it also affect the CMOS time?

Answer 1

Hello,

For your first question:

Please check the configuration and status of the NTP server to ensure that all PCS are properly connected to the NTP server. Then check the computer in question for malware or viruses. Also check the operating system to see if there are any bugs that may be causing this problem.

For your second question:

Windows time changes usually do not affect CMOS time. This is because Windows system time and CMOS time are managed by different hardware and software components. Windows system time is maintained by the operating system, while CMOS time is maintained by the hardware clock on the motherboard (powered by a CMOS battery). When you change the system time in Windows, the change only affects the time display and calculation of the Windows system itself, and does not directly affect the CMOS time.

However, in some cases, such as during system startup, Windows may read the initial time setting from CMOS time and use it as a starting point for system time. But this does not mean that a change in Windows system time will affect CMOS time in reverse.

Answer 2

Hello

Do you have any other questions?

What is the current progress of the issue?

Thanks