This prevents Windows from fighting the software's attempt to change the date. Manually Set the Date If the software doesn't do it automatically, click under "Set the date and time manually". Set the year to one year prior to the current year (e.g., if it's 2026, set it to 2025). Run as Administrator Right-click your WinOLS 4.7 loader or executable and select Run as Administrator to ensure it has permission to modify system time settings. Use a Virtual Machine (VM)

If you are using a modified version, these errors are often intentionally built-in to force updates or payments.

If synchronization fails, try changing the server to time.nist.gov or time.apple.com in the Control Panel's settings. 2. Manual Date Rollback (For Certain Repacks)