Let me start by saying this is a weird one. If you are installing VS and you notice that progress bar just isn't moving. Chances are it is stuck on something internally, to kick it out of this state, we "threaten" visual studio by initiating a windows shut down. This will result in windows prompting you to make sure you want to follow through. You can cancel out of the shutdown, and it should release visual studio from the stuck progress bar or what ever perpetual task it was stuck on.