Looking at your picture it looks like the download has cut off before the file is complete, you have 23.5mb, and the patch is 28.5mb, try a different mirror, or a download manager like getright.
Maybe, just get getright or similar, then at least you can resume, also what browser are you using?, I find IE a lot worse for downloading than Firefox.
1st time i downloaded the patch (s) it didn't unzip properly. tried from another mirror and it worked fine. then updated to patch T several hours later
just tru another mirror. proxy shouldn't be an issue with most (all?) mirrors.