Scroll down and locate or SolidWorks Licensing Service . Right-click the service and select Stop . Try running the activator again. 4. Clean Up Old Registry Keys
: Uninstall any existing license server versions and manually delete any remaining DLL files in the installation directory before trying again. Check Antivirus Quarantines solidworks 2018 activator ssq error 6
The existing activation state stays preserved across the upgrade cycle. Scroll down and locate or SolidWorks Licensing Service