Ensure you download the version matching your OS (64-bit or 32-bit). During installation, it is recommended to disable your internet connection
If you’re trying to jailbreak an device (iPhone 3GS, iPhone 4, iPod touch 4th gen) using p0sixspwn , you might see this error. It means the jailbreak tool cannot find a compatible iTunes installation. p0sixspwn requires itunes 105 or above