This looks like the screen hardware is bad.
Do you see the lines when you first turn on the computer, or it only shows when it's in Windows?
If this is a Desktop, can you try with another monitor and/or another monitor's cable?
If this is a Laptop, can you contact an external Desktop monitor and check?
I would like to do these things before i accept the answer.
how do i let you know if everything is working good.