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Q: iOS 9.3.5 update failed on iPad. Now unable to update or restore to factory presets. "An unknown error occurred (52)"

I attempted to update my iPad from iOS 9.3.4 to iOS 9.3.5 directly from latest iTunes on Macbook Pro running latest update of El Capitan. I had tried updating the iPad without iTunes, but it failed and showed picture asking to connect to iTunes.

 

The update failed half way through (can't recall the exact message) so I disconnected the iPad, restarted iTunes and tried the update again but the update consistently fails with the message "An unknown error occurred (52)". I have also tried using iTunes on my iMac running Yosemite but that failed as well.

 

I did all the things listed here:

https://support.apple.com/en-us/HT201210

 

The iPad was working fine before the update attempt.

 

Is there anything left to try? Has this iOS update broken my iPad?

iPad, iOS 9.3.4

Posted on Sep 2, 2016 11:12 AM

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Q: iOS 9.3.5 update failed on iPad. Now unable to update or restore to factory presets. "An unknown error occurred (52)"

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