drivers missing, CDC drivers. help me

Exe version: Avengers Box MTK 0.2.4
Selected phone: MT6572_EMMC
Action: Backup NVRAM Meta Mode
Curent Platform: MT6572
Phone must be off with battery inside.
Please insert USB cable now…
Detected(5) : MediaTek PreLoader USB VCOM (Android) (COM5)
Starting META mode, wait…
Restarting, wait….
Restarting to meta,wait….
If drivers missing, please install CDC drivers.
This can take up to 5 min on slow phones.
If take too long, check device manager for drivers.