You have problems that are on completely different circuits, so instead of one problem, I think you have more than one.....
I doubt it's a power drain or you would have trouble starting the vehicle.....
You have to treat the power windows as a separate problem, which is easy to diagnose by pulling you master switch and checking the various circuits with a test light...
As for the cruise going out using the directionals, that sounds like a broken wire or bad switch...