Since Legacy iOS Kit is not for Windows, you can boot your Windows PC into temporarily without installing anything on your hard drive. How To Downgrade an iPhone 5s to iOS 10.3.3 in 2024!
| Error Code | Meaning | Windows Fix | | :--- | :--- | :--- | | | IPSW not signed / Not using exploit | Ensure LeetDown says "Exploit sent". Disable firewall. | | 11 | USB communication failure | Use a USB 2.0 port. Disable USB selective suspend in Power Options. | | 14 | Corrupt IPSW | Re-download the 10.3.3 IPSW from a different mirror. | | 2005 | iTunes version too new | Reinstall iTunes 12.6.5.3 and block updates. | | Exploit failed | Timing issue | Reboot PC. Put iPhone back into DFU. Try a different USB cable. | iphone 5s downgrade to 10.3.3 windows
If LeetDown fails repeatedly, you can use a on Windows (using VMware or VirtualBox) to run the "iOS-OTA-Downgrader" script. This is more reliable but requires command-line knowledge. Since Legacy iOS Kit is not for Windows,