is proprietary software developed by Dassault Systèmes. Using a “SolidSQUAD activator” (a crack/keygen) is illegal in most jurisdictions and violates the software’s end-user license agreement (EULA).
If you are a student with a .edu email address, you likely have access to SolidWorks for free via your university’s "SolidWorks Academic License." Alternatively, the "Student Engineering Kit" costs around $100 for a 12-month license. solidworks 2016 solidsquad activator