Chuwi Herobook problems with bios and Windows 10

I bought Herobook Chuwi with preinstaled Windows 10.
I was very happy and it worked until at one moment Windows dissapier and when i start Herobook it s only " Aptio Setup Utility" - i cannot go out of Bios and go to Windows again, like Windows donr exist anymore.
I haven’t done nothing on control panel and havent touched the windows settings.
Can someone help me?