Problem with the clock on my computer

Hi @Thành Phát Lê, 

Good day to you! Welcome to Microsoft Q&A. 

Regarding to your description, the issue could be related to Windows time sync service, please try the following steps to see if the issue persists: 

1. Enabling the SynchronizeTime task.  a. Simultaneously press the Windows + R keys to open Run command box.  b. Type taskschd.msc then click OK to open Task Scheduler. 

c. On the left pane in task scheduler, expand Task Scheduler Library -> Microsoft .> Windows. 

d. Under Windows, scroll down and select Time Synchronization. 

e. In the right pane, under the Name column, right-click at SynchronizeTime and click Enable. 

f. Close the task scheduler, then check if the time on the device is syncing.  

If the problem persists, continue to step 2 below. 

2. Start/Restart the Windows Time service. 

Once the time synchronization task is enabled, proceed to start the Windows Time service (or to restart it if already started). 

a. Press the Windows + R keys to open Run command box. 

b. Type services.msc and click OK to launch Services. 

c. Locate Windows Time among the services, if it is running, right-click and Restart the service. However, if it is stopped, right-click and select Start. 

Now check if the time is automatically synced. 

d. Use Another Internet Time Server. 

Another method to solve time synchronization problems in Windows 10, is to change the Internet time server to which Windows is connected to synchronize the computer's time. 

e. Press the Windows + R keys to open Run command box. 

f. Type control date/time and click OK to open the "Date and Time" settings. 

g. At Date and Tine window, ensure that you have specified the correct Time Zone. 

h. Then select the Internet Time tab and click Change Settings. 

i. Ensure that Synchronize with an Internet time server is checked. Then, click on the dropdown and change the time Server. When done, click Update now. 

Once it updates, the time on your device will synchronize correctly with the time of the region where you are based.  

Note: If, after following the above methods, your computer loses time after shutdown, this indicates a faulty CMOS battery. In such a case, replace the CMOS battery in the device. 

If you have any further questions and concerns, please let me know. Looking forward to your response. 

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