So.. I logged on to Minecraft. Minecraft froze, so I opened up Task manager, and killed the process 'java - Minecraft'

Well, now I try to log into Minecraft, and I get past the login screen. But when I attempt to join any Miltiplayer server, my Computer freezes, and MInecraft quits itself, no error report.

I know this is a poor description, but it is everything that happened. I have also tried to reset my internet, my computer, done a rollback on the computer, restart computer, upgrading the computer, but nothing seems to work.

Can the problem be located in Java itself?