[HELP] Razr I i cant install any Stock ROM!

[tibaland]

Hello guys...

I need your help,

First of all my XT890 is not recognize in RSD Lite ( i think because im using Windows 10. )

My XT890 are a Brazilian model, and he is fixed on Motorola logo.

What i do/ can do...
I can enter in fastboot
I unlocked bootloader
I instaled a TWRP 6.0.52
I cant mount internal sdcard to see in Windows...
In fastboot my phone show USB Disconnect or Connect when i plug in PC.
Fastboot show devices recognize my cellphone, rsd lite not recognize.

All ROM´s i tryed install with fastboot and i get the same error

bootloader variable is not supported


Any good person can give me a light!?