You are at the right place! I can help you jailbreak iOS 4.3.1 on Windows on iPhone 3GS, 4, iPod Touch 3G, 4G or iPad. The iOS 4.3.1 jailbreak on Windows can be done with the help of recently released Sn0wbreeze 2.4 tool, which could also help iPhone users to preserve baseband while upgrading, and thus keep the unlock on their devices after iOS 4.3.1 jailbreak.
Here is how to jailbreak iOS 4.3.1 on Windows :
1. Download Sn0wbreeze 2.4b1 from here.
2. Download iOS 4.3.1 IPSW file for your device.
3. Download iTunes 10.2.1.
4. Now follow the steps given here (from step 4 onwards) to jailbreak iOS 4.3.1 on Windows with any compatible device (Use your respective device and its firmware, i.e. iOS 4.3.1 where ever needed). iBooty instructions are also given there.
That’s it! You’ve jailbroken your device on iOS 4.3.1.
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