You can solve the problem by cutting a large opening in a basement wall and adding a window that meets code requirements for egress. You'll find contractors willing to do this work, often for between $2,000 and $3,000, or you might consider doing it yourself.
Caps Lock is a button on a computer keyboard that, when pressed, causes all letters to be generated in capitals until deactivated. It is located in the position of a similar Shift lock key (and sometimes a Ctrl key) found in some other keyboard layouts. It is usually a toggle key: each press reverses its action.
I believe, you might be having a Microsoft Keyboard which has an F-lock button to enable the function keys. But, in other keyboards, since they do not have an F-Lock button, the function keys are always on.