If you need to use SolidWorks 2015 legally, you should avoid activators and use official channels:
One common troubleshooting step found in activator-related discussions is to delete license files stored in the system directory. Specifically: solidworks 2015 activator
To help you find the right approach for your project, please let me know: If you need to use SolidWorks 2015 legally,
While specific implementations vary, these activators often work by: solidworks 2015 activator
SolidWorks 2015 Activator is a software tool used to activate and license SolidWorks 2015, a 3D computer-aided design (CAD) software. The activator is used to validate the software license and allow users to access all the features and functionality of SolidWorks 2015.