Okay, so, the issue I've been having is that whenever I try to log onto Minecraft, the world freezes on the "Building terrain" or "loading world" screen and won't let me exit out of it unless I use Task Manager. On multiplayer servers I've been able to get a little further into the game, though. I'm able to see the spawn point and what ever loads in front of me, but it immediately freezes and crashes. I've already tried changing the render distance, messing with the vysnc and vbos, deleting and reinstalling minecraft, and switching the versions. (I don't know how to check which version of Java I'm using so I can't include that in here, sorry. I installed the latest update yesterday, though.) This has been going on for a week or so. I'm not using Forge. (I'm not a computer whiz so please keep what ever tips you send me as comprehensible as possible.)