urgent help needed with Huawei phone

I have a Huawei Y625-U51 (Y625-U51V100R001C577B111)

After installing some updates and rebooting it the phone wont start anymore ..

it start then the logo shows up but nothing happen afterward .... only the logo ... it doesn't even shutdown only after I take the battery out

so I thought the rom is damaged .. but after downloading the stock firmware from a forum (cause it was the only one I could find) and placing it on a sd card .. the firmware doesn't want to install and it gives me this message:

Finding update package...
Opening update package...
Verifying update package...

E:footer is wrong
E:signature Verification failed
Installation aborted

ps: I should mention that the phone doesn't run -clockworkMod recovery- and the menu only have six options:

1-reboot 2-update from ADB 3-update from external 4-update from internal 5-wipe data 6-wipe cashe

I hope someone helps me out with this problem very soon

thankz in advance

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