what happens when you restart

when you restart everything is reset and wiped clean. An analogy is a blackboard that has just been cleaned. as you use it it fills up you run out of room to write, you erase it but some dust remains and with some of the sloppy software out there today it doesn't always release memory the way it should, eventually things get clogged up to a point where you need to wash the blackboard. I hope this helps