|Closing when you go to Minimize is very unusual, are you quite certain it is not in the taskbar somewhere?|
As for the rest, sometimes to get full screen it sticks if you pull out the sides rather than use Maximize. The other thing is when a window is in a sub-folder, next time it will always revert to the size of the main folder. In which case you make the main folder bigger and it should work out.
Please come back and let us know the outcome.