WinOLS 4.7 is older software. The error may be intentional by the license system if:
This is the "holy grail" solution for many users. It involves applying a patch that removes the date check from the WinOLS executable file itself. These are often labeled in online forums. winols 4.7 your system date is wrong
“Your system date is wrong. Please check your date and time settings.” WinOLS 4
If your PC loses time every time it is turned off, your motherboard's CMOS battery may be dead and needs replacement. Alternative Solutions and hit Enter.
Sometimes a corrupted configuration file retains the error state even after you change the date. Close WinOLS completely. Press Windows Key + R , type AppData , and hit Enter.