Jailbreak hacker iH8sn0w has released iREB 5 for Windows users.This is a simple custom iOS firmware install tool that will help you bypass iTunes errors when restoring an iOS device from a custom firmware IPSW.
iH8sn0w said in his release notes:
* Much smaller file size (390kb).
* Fixed USB 3.0 issues.
* iREB’s speed for the iPhone 2G/iPhone 3G/iPod Touch 1G has increased significantly!
* Fixed rare DFU detection issues.
* Updated limera1n/steaks4uce payload to not hook “cmd_go” on 4.x images (nothing severe, but useless here).
The errors (1600, etc.) that iTunes occasionally gives when installing a cooked firmware, will be fixed now. Once you have created a custom IPSW with a tool like Sn0wBreeze, iREB can be used on Windows to get pass any iTunes related problems you may come across.
Source: iDownload Blog