@Chairuek777MASk741's idea is BS.
The key combination to switch between windowed and full-screen modes is ALT (left alt) + ENTER. If it does not do anything, make sure that the game window is active, either via ALT+TAB or click in the middle of the window and then do ALT + ENTER. If that does not work, there is something very wrong with your Windows configuration if ALT + ENTER is not allowed. Works fine for me in Payback using Windows 10 Pro 64 bit.
Edit: I might have read you wrong. You should try making sure you have the latest GPU drivers as well. But the "borderless gaming software" is still BS. That is basically your GPU drivers.
