William has received a Tetris game from someone in his computer programming class through email.William does not really know the person who sent the game very well, but decides to install the game anyway because he really likes Tetris.
After William installs the game, he plays it for a couple of hours.The next day, William plays the Tetris game again and notices that his machine has begun to slow down.?He brings up his Task Manager and sees the following programs running (see screenshot):
What has William just installed?