In recent Windows systems, click on the clock at the bottom right of the screen. This will show the date and time and includes a link to "Change date and time settings". Click this link to open the Date and Time window.
On the "Date and Time" tab, click the "Change time zone" button. Check that the correct time zone is selected and check that the Daylight saving tick box is set correctly. Confirm any change.
Next, select the Internet Time tab and click the Change settings button. Make sure the tick box is set to Synchronise with an Internet time server, and choose an appropriate server from the list (or add one of your choice). I have even used the address of my router on my private network on occasions for devices I use only at home. This is the gateway address that the device uses to reach the Internet.
Finally, click update now. This can fail if the chosen server is not available. Sometimes, if the date is wrong, then the time setting will fail. If this happens, go back to the "Date and Time" tab and click the Change date and time button so that you can correct the date. Then go back to the Internet Time tab and try the update again.
Once configured correctly, the computer's clock should be within two or three seconds of the exact local time.
I hope this helps.