Tela azul recovery

Bom dia,

Do nada apareceu uma tela azul no meu pc com a seguinte mensagem:

Your pc needs to be repaired

The operation system couldnt be loaded because a critical systen driver is missing or contains errors.

File: /windows/system32/drivers/avguniva.sys

Errorcode: 0xc0000221

You ll need to use the  recovery tools on your installation media.

Press enter to try again

Press f8 for startup settings

Press esc for uefi firmware settings

O que eu faco??