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Synchronizing your computer clockIf your computer is a member of a domain, your computer clock is probably synchronized automatically by a networktime server. If your computer is not a member of a domain, you can synchronize your computer clock with an Internet time server.If synchronization is enabled, your computer clock is synchronized with an Internet time server once a week. However, if you don't have a continuous Internet connection through a cable modem orDSL modem, the automatic synchronization might not always occur. In that case, you can force an immediate synchronization by clicking theUpdate Now button on the Internet Time tab in Date and Time in Control Panel. This tab is only available if your computer is not a member of a domain.If time synchronization failsWhen you click the Update Now button, your clock should be synchronized immediately. If it fails, it might be for one of the following reasons:You are not connected to the Internet. Establish an Internet connection before you attempt to synchronize your clock.Your personal or network firewall prevents clock synchronization. Most corporate and organizational firewalls will block time synchronization, as do some personal firewalls. Home users should read the firewall documentation for information about unblocking network time protocol (NTP). You should be able to synchronize your clock if you switch to Windows Firewall.The Internet time server is too busy or is temporarily unavailable. If this is the case, try synchronizing your clock later, or update it manually by double-clicking the clock on thetaskbar. You can also try using a different time server.The time shown on your computer is too different from the current time on the Internet time server. Internet time servers might not synchronize your clock if your computer's time is off by more than 15 hours. To synchronize the time properly, ensure that the date and time settings are set close to your current time in the Date and Time Properties in Control Panel. NotesTo open Date and Time, click Start, click Control Panel, and then double-clickDate and Time. An Internet time server updates the date set by your computer as well as the time.The Update Now button is not available unless the Automatically synchronize with an Internet time server check box is selected.You can change the time on your computer clock manually on the Date & Time tab in Date and Time in Control Panel. You can also open Date and Time by double-clicking the clock on the taskbar.Related Topics<object id="pchealth" classid="CLSID:FC7D9E02-3F9E-11d3-93C0-00C04F72DAF7" width="1" height="1"> </object> Rikki Tikki Tavi