Contact HOTMAIL support regarding this, they may be able to locate what IP address the changes/hacks to your email originated from and when they were innitiated, but... they probly won't tell you who did it. You will probly have to prove your identification to hotmail. If you have important info in your mail; get on the ball; make sure that any of your sensative data is protected; that you can still log in to your mail, that you change your password, and contact everyone on your email list to inform them that someone may have jacked your email logon for a bit and to ask them to forward any of the mail's that they recieved from your account, durring the time that your mail account was compramised..