MSN 7.0 crashing for no apparent reason

So here's what happend. I was talking to a friend on MSN. And then I shut down MSN. 5 minutes after that, I ran MSN again, and it started crashing for no apparent reason. Everything is alright before I press 'Sign In'. It starts signing in, and then crashes after few seconds. I uninstalled it, restarted the computer, then installed it again, no effect. Then I uninstalled it again, installed MSN 6.0, same problem. I'ma go mad...please help.

Thanks for all the help.

If noone has the answer, noone will reply, it's that simple!