Hello. My name is Michael. I can help you with your question. Can you please provide more specifics?
For example, you say you cannot get into Windows 8 - but is your system starting up completely?
I may just be confused by the email reference, but I want to make sure. Email definitely wouldn't stop your system from starting up, if that is what is happening. What is the exact wording of the message that you get and when does it come up?