I will explain in full detail of my problem. 1.7.10 is a very popular modded version of the game, therefore I recently attempted to install some mods with it. The process went fine, and it loaded up. Unfortunately, the game would crash whenever I attempted to start a world. I made sure it wasn't the mod, by attempting to install about three other mods. I think it might be because the 1.7.10 Forge is outdated. If this is the case, I'd like to ask any developers reading this to update 1.7.10 Forge, and I'm sure many others can say the same. If not, I hope somebody can tell me the problem and maybe a solution.

1.7.10 is no longer supported by Forge, which means it won't receive updates and you won't get any help with it on this forum.