Windows cannot boot and always enters BIOS

I’ve had the Ubook Pro for 2-3 weeks and suddenly one day it cannot boot into windows. When i see the CHUWI logo, it doesn’t have the circle spinning and always enters into BIOS. Please help? Thanks.

You need to reinstall the system.

Can this be done if i cannot boot into windows? Your powerpoint shows how to do it while logged on to windows. I cannot get to this point. Please help. Thanks.

I cannot boot into windows to do the action proposed. I can just enter BIOS.
Windows recovery doesn’t work. Please help. Thanks.