The term that is being looked for in this problem would be most probably and most likely to be the Recycle Bin.
Microsoft's trash receptacle is called the Recycle Bin. This is where deleted files and folder are moved after being deleted. Simple selecting the file or files and pressing the delete key would prompt you to make sure that you really wanted to do this. This is a precautionary action of the computer to let you know what you are about to do. This is to make sure that errors wouldn't happen in the future since some files are highly sensitive, some programs also are, and some files are just too big for the Recycle Bin to be handled, thus they are deleted permanently.
A troll's main goal is to provoke a reaction from people, so I'd say the best way to stop the troll in his or her tracks would be to log off and not give the troll any satisfaction.
Then again, the troll might see you logging off as a win because he or she made you rage quit, so maybe replying with a quick "no u" to troll the troll before logging off would throw them off. That being said, the long term solution would still be not responding at all. After a while of no reactions the troll would most likely get bored.
A - they all use microprocessors to compute and store data.
A software that is free of cost for a certain amount of time such as Adobe programs, or Winzip.