: WinOLS might require administrative privileges to run correctly. Try running the software as an administrator to see if this resolves the issue.

: Some users manually change their Windows system date back to a year when the software was active (e.g., 2021 or 2022).

Below are proven solutions, ranked from simplest to most advanced.

WinOLS checks the system date to ensure that license files (usually .lic or key files) are valid. If you are using a "patched" version, the patch often sets a specific "freeze date" to trick the software into thinking it is always within the valid license period. If your actual system date differs significantly from this expected date (usually if your date is in the "future" compared to the license validity), the error triggers.

Doing this will likely break your internet connection and cause "SSL Certificate" errors in web browsers, as the web requires a synchronized current clock. Date-Specific Loaders:

License-specific fixes