KDZ ERROR "File Extract Error." "Finished"

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hey, i have an LG optimus G 97310H i have rooted my phone but now i must send it away as it is having hardware issues.
i used superSU to permanent unroot. but for some reason SUPERSU PRO is still in my applications list.
and it dose not give me an option to remove just Enable OR DISABLE. so what im trying to do is remove it. so i thought if used KDZ and installed the official ROM. i downloaded the ROM from 2 sources. and when ever i put my phone in download mode. KDZ gives me this error.
"File Extract Error."
"Finished"
any help on how to fix the KDZ error. or if i can remove the superSU another way?

**** its also not a custom ROM installed ***

Re: KDZ ERROR "File Extract Error." "Finished"

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Is your phone in download mode?

LG Optimus G E971

Originally Posted by Elisha

Is your phone in download mode?

LG Optimus G E971

yes

Corrupted kdz? low free space available? virus?

Re: KDZ ERROR "File Extract Error." "Finished"

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Reboot pc and try different usb port.

LG Optimus G E971

I see no any reference between "File Extract Error" and "different usb port"

.KDZ is an archive, which will be privately unpacked by update tool and if the checksum of .dz (or .tot) is ok, flashed to the device.

"File Extract Error" means .kdz unpacking went wrong.

Originally Posted by Tim4

I see no any reference between "File Extract Error" and "different usb port"

.KDZ is an archive, which will be privately unpacked by update tool and if the checksum of .dz (or .tot) is ok, flashed to the device.

"File Extract Error" means .kdz unpacking went wrong.

hmm mayve it is a bad kdz. do you know where i can find another one?
i tried one from the LG tool i found on here and one mirror

Any updates for this issue? I got a LG Optimus G Pro F240L from south korea and it is stuck in download mode. Everytime I use KDZ updater I got the same error: Extract File Error

Since it's a model less common I managed to get the KDZ from only one place (lg servers).

Need help lol!