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HP ENVY 17.3 inch Laptop PC 17-ch1000 (436W7AV)

Hello everyone.

I have a problem with my hp envy 17-ch1056nf. I wanted to update the bios to the latest version by creating a usb key with the hp utility. Except that after launching it my pc started to restart in a loop. I remade a key and tried again but without success. I have the bios utility that opens but a message displays bios recovery failed unable to open bios signature file. Have you already encountered this problem? How to solve it?

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