Let Windows7 time show more accurate

Left click on the Windows 7 time bar, in the pop-up window click "Change Date and Time settings" (The following figure red box).

Then, switch to the "Internet Time" tab, click "Change Settings", in the pop-up Window server column, delete the default time.windows.com, and then enter a new server address: pool.ntp.org, click "Update Now" when finished.

The update displays the time when the last sync was successful, the server automatically synchronized for one week, and pool.ntp.org on a variety of systems/servers compared to Windows default time server, and reliability is not a problem.

When the setup is complete, the accuracy of Windows system time is more secure, of course, you can also try to create a scheduled task, so that it updates once a day, this job will be left to their own hands.