Download How To Remove Window Screen Without Tabs Pictures. Search for the tabs on the inside of the screen. A lot of window screens have little tabs that you just push in and out comes the screen, but not my windows!
Take a kitchen case knife and insert it in the area between the screen and frame on the side where the tabs were and pry it towards the middle until it clears the frame.
It's got two pin/button looking things that seem to be on a spring, but i can't figure them out. Pull the right tab toward the center again. These artifacts are random and can be created in multiple ways, although they occur rarely. In the boot tab, you will be able to see all or any windows that are present in.