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TUTORIAL - Failsafe method to restore the current version of IOS

How about reverting back to older versions like 5 or 6?

Sent from my iPad 4 128GB

Not possible without a boot level exploit (preferably a hardware exploit). There are software exploits that you can use to downgrade an iOS version, but it's not worth getting them patched when they can possibly be used for a jailbreak in the future.The Pangu team stated a while back that they were working on a downgrading method, but why use the exploits for downgrading when you can save them to jailbreak the future iOS's, which is the only true reason why people want to downgrade.
can you use tinyunbrella in a windows platform pc ? or is it only for macs