Sometimes, WinOLS writes a "flag" to your registry when it detects a date error. Press Win + R and type regedit . Navigate to HKEY_CURRENT_USER\Software\EVC . Look for subkeys related to versioning and date checks. Warning: Always back up your registry before deleting keys. Preventing Future Lockouts
Before trying complex fixes, ensure your OS is actually correct. Right-click the clock in your taskbar. Select . Click Sync now under the "Synchronize your clock" settings. Ensure "Set time automatically" is toggled ON . 2. The "Date Rollback" Technique winols+47+your+system+date+is+wrong
Corrupted license data can trigger Error 47. Sometimes, WinOLS writes a "flag" to your registry
WinOLS 4.7 is high-end professional software. Most versions circulating outside of an official EVC license are "timed" releases. The software’s internal security checks the current system date against a hardcoded expiration date in the program's license loader. Look for subkeys related to versioning and date checks