As you can already read in the question that my Minecraft can't start I have a question. How do I fix the error It is usually there that a file can't be downloaded. Can you fix it. I've already miniert Mincraft and forge too. I read that man java should download new but how to download other java versions down.
So you can try reinstalling Java on the official site of Java.
Or look in the mods folder if it is possibly s.ein mod.
Try to remove all mods for a short time. If it does not work, take another Forge 1.7.10 release. Anyway, it invites me. Otherwise, you have to screw to your firewall settings.
Maybe you have too little memory! Or too little ram