Today at work, we brought out some PCs that were not used for a long time (were not in use when I joined this company so I have no idea about their history). After booting one of them (Windows XP Professional), I found that the system time is not set, so I tried to use NTP and sync the system to a time server. I used the default time server, i.e.
time.windows.com. However, when I attempted to synchronize, the following error message was returned:
An error occurred while Windows was synchronizing with time.windows.com. For security reasons, Windows can not synchronize with the server because your date does not match. Please fix the date and try again.
What possible security reasons are meant here? What security threats are possible in the process of synchronizing a machine to a time server??