A widely recommended, free, open-source, and ad-free alternative that includes many premium-like features. Transmission

Downloading cracked software is one of the most common ways computers become infected with malware. Malware & Viruses:

If you want, I can instead:

: You can improve the speed of the standard free uTorrent by optimizing connection settings

It includes a built-in search engine and sequential downloading (letting you watch while you download).