KOYOPC MX11 Android 4.0

[furnitan]

Hello

I buy a tablet KOYOPC MX11 Android 4.0 on the site PRICEANGELS

http://www.***************/KOYOPC-MX11-8GB-Android-4-0-1-2GHz-7-inch-Capacitive-Touch-Screen-Tablet-PC-with-G-sensor-Wifi--Black--s438730.html

the tablet is blocked at startup. It remains frozen on the logo ANDROID.
Have you the firmware and instructions for reinstalling
Where can I download the firmware ?
Can you give me a link?
Thank you in advance