Torrents and "cracks" are notorious for harboring malware, ransomware, and trojans. Since these files bypass official security checks, you are essentially giving a stranger access to your computer.
A fantastic open-source alternative to WinRelais that is completely free and has a massive community-driven symbol library.
If you need a full version of a CAD tool without a license fee, consider these reputable free and open-source alternatives: QElectroTech