Internet Time Synchronization

Information

You can synchronize your computer clock with a internet time server. This means that the clock on your computer is updated to match the clock on the time server, which can help ensure that the clock on your computer is accurate. Your clock is typically updated once a week and needs to be connected to the Internet for the synchronization to occur.

WARNING

TO HELP PREVENT TIME SYNCHRONIZATION PROBLEMS Make sure that the time zone, time, and date are manually set correctly on your computer, or you may have a hard time trying to synchronize your computer clock with a internet time server. If the time is to far off, it may not be able to synch with the time server. See: How to Change the Date and Time in Vista and How to Change the Time Zone in Vista Vista gets the initial time from the BIOS, so check to see if the time and date are correct in it to. Check the CMOS battery on your motherboard to see if it is getting weak and dying. If weak, it can cause your clock to run slow, loose time, or reset if dead. If this is the case, you will just need to replace the battery. It will usually be a lithium button cell, type CR2032. Check your motherboard documenation to be sure. Check your 3rd party firewall program and router settings to see if they have blocked the NPT access on UDP port 123. It should be set to open or allow. Windows Firewall will allow Internet Time Server through by default, unless changed. For McAfee Firewall, see: McAfee Document ID: 307135 For Windows Firewall, make sure that Internet Time Server is checked and added as an exception. See: How to Add or Delete an Exception in Windows Firewall in Vista

NOTE

The Internet Time Synchronization use the Windows Time Service with the default settings of Started and Automatic. For how to change this, see: How to Disable or Enable Vista Services

Tip

For a list of time server names with their IP Address numbers to use in step 10B, see: Microsoft Help and Support: KB262680 A list of the Simple Network Time Protocol (SNTP) time servers that are available on the Internet

• How to Change the Internet Time Synchronization Update Interval in Vista
• How to See the Date and Time on the Taskbar in Vista
• How to Set the Clock to Military 24 Hour Time in Vista
• How to Add Additional Time Zone Clocks in Vista
• How to Change the Date and Time in Vista
• How to Change the Time Zone in Vista
• How to Change the Date Format in Vista

NOTE

If your computer will not keep accurate time even after synchronizing and changing the time servers below, then see: How to Change the Internet Time Synchronization Update Interval in Vista

1. Right click on the clock on the taskbar. (See screenshot below)



2. Click on the Adjust Date/Time button. (See screenshot below)



3. Click on the Internet Time tab. (See screenshot below)
4. Click on the Change Settings button.



5. Click Continue for UAC prompt.

6. To Just Turn Internet Time Synchronization Off or On -

A) Uncheck or check Synchronize with an Internet time server and click OK. (See screenshot below step 7)
B) Go to step 13.

7. To Synchronize the Computer Time with the Internet Time -

A) Click on the Update now button. (See screenshot below)
NOTE: Synchronization must be turned on for this to work in step 6.

8. You will now see the screenshot below.



9. If you see this in the screenshot below, then click Update now again to see if it will work this time. If you still get the error message below, continue to step 10.



10. To Change the Time Server -

A) Click on the drop down arrow and choose another time server. (See left screenshot below)

OR

B) Type in a new time server name in the field instead. (See right screenshot below)
NOTE: For a list of time server names to type in here, see: Microsoft Help and Support: KB262680 A list of the Simple Network Time Protocol (SNTP) time servers that are available on the Internet,

C) Click on the Update now button to try the new time server.
NOTE: You may need to repeat step 10 until you find a time server that will work. If you just cannot get it to sync, then see the WARNING at the top of the tutorial for settings to check that may be preventing it from working.

11. If successful, you will see this in the screenshot below.



12. Click OK. (See screenshot above)
13. Click OK. (See screenshot below step 4)