Since Antares no longer sells Auto-Tune 5 directly (their current store features Auto-Tune Pro), you have two options if you want to use this plugin legally and safely:
While modern versions like Auto-Tune Pro are technically superior, many engineers still hunt for the version 5 VST because: Autotune 5 Vst Zip Download
For those truly chasing that sound, the modern path is rarely a sketchy download. It lies in Antares' official legacy support Since Antares no longer sells Auto-Tune 5 directly