Some files won't work

Okay, so I bought minecraft off the website. I was planning on playing it tonight but I guess that won't happen because of my problem. I downloaded the game and installed it, I clicked on the icon on my desktop and it opened to a screen with a green button saying 'PLAY Download 1.11.2-Latest release' I clicked it and it started downloading. It then said a file (can't remember which) couldn't be downloaded, so I tried it again, it said a different file couldn't be downloaded, I did it about 20 times and got the same result. It would be amazing if someone could help me with this.