Failed to write core dump. Minidumps are not enabled by default on client versions of Windows

It works fine until i start a world of join a server, then when it finishes loading and starts to display the world it crashes. i tried updating java to no avail.
the most recent crash before reporting is of hs_err_pid15708
i hope this report can help in fixing this problem, it is also effecting my roommates computer so it might be the campus internet, but i highly doubt it.
Thank you,
Dominick Lancaster