Installation Contents Installation Manager The following products are available in the Installation Manager: Previous Toolbox Detected When Installing or Upgrading If you are upgrading to SOLIDWORKS 2017 or installing SOLIDWORKS 2017 side-by-side with an earlier major version, the Installation Manager prompts you to decide how to handle your existing Toolbox/Hole Wizard data. Uninstall Completes Even When DLLs Cannot Be Unregistered You can uninstall the SOLIDWORKS software even if some DLLS cannot be unregistered. At the end of the uninstall process, a dialog box lists which DLLs failed to unregister. Typically, no further action is necessary.