There are some malware available which actually keep on sending the bad password to your account continuously, which results in blocking your account. This is an old method of harrasment and you must contact Hotmaill without a delay. They actually take this kinda seriously. It happened to me once and after I contacted Hotmail, within a week I had my account back and an email from Hotmail staff stating that they had tracked down the bastard and managed to contact his ISP. To see how this thing works let's watch a video. :)