Because iOS 6 on A5 devices is a pristine, snappy, skeuomorphic wonderland. Modern iOS is flat and slow on old hardware. An iPhone 4S running iOS 6.1.6 is faster than an iPhone 6 running iOS 12. Jailbreaking with p0sixspwn allows you to:

[question] p0sixspwn requires iTunes 9 or above : r/LegacyJailbreak

If you prefer not to fully downgrade iTunes, you can often fix the issue by: Downloading the iTunes Driver 1.0 (often found in jailbreak archives). Manually placing iTunesMobileDevice.dll into the same folder as the p0sixspwn.exe 4. Run in Compatibility Mode

You must uninstall Apple-related software in this specific order to prevent driver conflicts: iTunes Apple Software Update Apple Mobile Device Support Bonjour

To bypass this error, enthusiasts must engage in "downgrading" their environment rather than their intent. The most effective solution is uninstalling all current Apple components—including Bonjour, Apple Software Update, and Mobile Device Support—and installing iTunes 11.1.5 or a specific "for older video cards" version. These versions bridge the gap, providing the 32-bit driver support the tool craves while remaining functional on Windows 10.