I am unable to log into one of my Hotmail accounts all of a sudden. Even when I try to reset my password, I get the following message: Microsoft account doesn't exist. Enter a different email address or get a new account.

I have tried to log into the Hotmail account from my other PCs and my iPhone using mobile Safari, without success.

NOTE: I am, however, able to log into my other 2 Hotmail accounts without any problems.

Please help!!!