Security software frequently flags activator tools as false positives, blocking execution. Open or your third-party antivirus. Go to Virus & threat protection settings . Turn off Real-time protection temporarily.
To avoid errors like this in the future, ensure you follow the standard sequence required by the SSQ team: solidworks 2018 activator ssq error 6
A previous SolidWorks licensing service is still running in the background. Security software frequently flags activator tools as false