SIMPLE SOFTWARE FOR WINDOWNS 8.1

Looking programmer who can develop screen lock for windows 8.1. I need to be able to do that in week advance and that thing can't be turn off until time i set up early pass. so in practice it would work like this - i set up time that every day next coming week my screen should be locked from 20:00 -00:00 every single day... and when i turn my laptop after 20:00 my screen will be blank with timer which says how much time left of screen being locked.... does not matter i will switch and restart my laptop - screen still has to be locked and timer showing time left to next block of time i can again use my laptop.... *******IMPORATANT - to be consider for this job you must start you proposal with word "screen lock"