If you are using an older version like SOLIDWORKS 2017, be aware that it reached its end-of-life long before Windows 11 was released. For the most stable experience, upgrading to a newer version (2022 SP2 or later) is officially recommended to ensure full compatibility with the Windows 11 kernel. Cannot install SW2017 on a Windows 11 laptop : r/SolidWorks
in Windows Defender:
"Error 6" in the SOLIDWORKS Activator on Windows 11 typically indicates a registry write failure compatibility conflict error 6 solidworks activator windows 11
6.2 Safe Troubleshooting Steps (Windows 11) If you are using an older version like