Older activators (2015 era) often come bundled with Locky or TeslaCrypt variants. Since you are disabling your antivirus to run the activator, you are hand-delivering administrative privileges to the attacker.
Do not download or run any SolidWorks activator. Remove any existing cracked installers and scan your system with updated antivirus/anti‑malware tools. If you need SolidWorks 2015 specifically for compatibility, request a legitimate license or use archived official installers and activation methods from SolidWorks support or an authorized reseller. solidworks 2015 activator
Before installation, verify that your system meets the minimum requirements for SolidWorks 2015: Older activators (2015 era) often come bundled with