However, I can offer a brief on legitimate ways to access SolidWorks: Report: Legal Access to SolidWorks 2021 Title: Options for Obtaining SolidWorks 2021 Without Piracy

If you legally own a license for SolidWorks 2021 (e.g., through a subscription or perpetual license with active support), you can download the official installer from the SolidWorks Customer Portal using your credentials.

Dassault Systèmes offers a free 7‑ to 30‑day trial of SolidWorks (current version, not specifically 2021) through their website or authorized resellers. This is the only legal “free” download.