Your computer's system date is not a suggestion—it is a critical component of digital security. Treat it with respect, maintain your hardware, and WinOLS will reward you with years of reliable, error-free tuning.
Windows' automatic time server sometimes fails. Force a manual sync.
This report outlines the causes and solutions for the "Your system date is wrong" error encountered in WinOLS (version 4.7, 5.0+, or older).