If you want to play minecraft with mod and it only crash follow my Tutorial here:What you need to do is open your minecraft folder.How you get the minecraft folder pres run and write %appdata% After it pres roaming/roming I dont no what its name is but pres .minecraft and you see a folder with name (Mods).Open the mods folder and drag out all mods files there. and pres play on minecraft and it work.But you play with no mods so test download mods and I it crash test with a new mod.But I can say if it noobs on minecraft You need to download right mod verision If you play with 1.6.4,1.7.10,1.7.2,1.5.2 or more verisons Download only mods with the verision you run with.Have a nice day!