Heralias

Hey There I'm Heralias Ive Been Having Trouble With Tekkit Legends As Of Late My Pc Wont Open It At All It Runs Technic Launcher Fine But When I Press Play It Trys To Run But Then Crashes Before It Even Opens If Any1 Knows Any Fixes I Am Willing To Try Them Thanks Heralias P.S My Pc Is An All In One So I Dont Know What Drivers Or Graphics Card I Use