Failed to validate request because the time between the server and client is not synchronized
This is the approved revision of this page, as well as being the most recent.
Prior to encountering this error, the user may have had a message requesting the license key be reentered and the message may also be accompanied by a message detailing a time differential and the maximum differential being exceeded. This is a straightforward error to resolve. It occurs when the computer's internal clock has been accidently reset. This could occur during a Windows update or other even.
To resolve the error and restore functionality to OOTP, review the date and time of the computer (including AM/PM) and ensure the computer's internal clock is accurate.