[ubuntu] Can't load main profile at login screen

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http://ubuntuforums.org – I was using my computer last night with no issues, today when I tried to log in, instead of loading the desktop I was faced with the login screen. I ensured my username was selected and typed my password. The screen goes black for a moment and then come back to the login screen. I instead tried to use remote login and was advised that my email or password were incorrect. Guest seems to login with no issues. I have therefore removed the password from my main account and set it to auto login, but to no avail. I don't seem to have access to my main (administrator account). Any ideas? (Hardware)