I've never rooted or unlocked the bootloader, after updating to official oreo 8.1(via OTA), Lenovo startup screen is blocking the screen so I cannot access anything directly, like, the touch and everything is working fine but with the lenovo screen I just can't see where I'm touching, the phone starts up ok and I can hear when I getting messages and I can use Whatsapp web to write messages, I could rotate the phone and see half of the screen and the other half Lenovo logo still blocks, Is there anything I could do exept factory reset?