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I have one tablet and i"m installing .zip from stock recovery but it gives following errors

Opening update package... Verifying update package... Verification failed Installation aborted.

So, I want to know that what causes this type of errors??

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    What is this zip file? – Dan Hulme Jul 12 '14 at 9:47
  • zip file containing custom recovery – RRD Jul 12 '14 at 12:02
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It sounds like the bootloader on your tablet is still locked. By default, most Android tablets will only boot and run stock recovery images and ROMs, for security. It verifies that the ROM is signed by the original manufacturer (or the carrier, for carrier-branded devices). You need to unlock the bootloader to let it know you want to run an unofficial image.

See the tag for more details, and a starting point to find out how to unlock the bootloader on various devices.

  • As far as I know, behavior of stock recovery is not related to the state of bootloader. – v6ak Mar 4 '18 at 20:45
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You usually cannot install anything but the official updates using the stock recovery. It checks signatures of the update files, for a good reason. Without that, anyone being able to modify the ZIP file (during download or on the storage, which can be available to ordinary apps) could get a root access and modify anything. It has not been intended for installing custom packages that are not signed by the manufacturer.

You need to use a custom recovery that is free of this restriction. It depends on your phone/tablet.

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