Windows 10 really sucks

I finally updated to Windows 10 a few days ago, but then I found out my files in th discs were totally gone. what the ****??? So I have to reintall Windows 7 which I used before the update, now things got even stranger, I was wantching the screen 15 seconds ago, and I did nothing with the keybord or the mouse, really nothing, and it just shut down automatically. This is just annoying, so who got any good ideas, please help