Mod packs not loading/ opening

[HayabusaSpartan]

I have been trying to fix my launcher and mods for awhile now and can't find a solution. I have downloaded 64 bit Java, Java 8 I believe, and dedicated 3 GB of ram. I have no clue why it won't work at all and when I press play, it just brings me back to the launcher almost instantly. I have no clue what to do and help will be appreciated.

[Torezu]

Logs?  Java version is important - if you're using 9, it's not going to work.  If your graphics drivers are outdated, it's not going to work.