I've had Ubuntu installed, using WUBI, for some time now - a few months or so. It's worked fine until now, allowing me to login, use it's features etc... Two days ago, I turned on my computer and started Ubuntu. It loaded the GUI fine but just showed the loading screen and even after waiting 10 mins on this screen it still wouldn't show me the login page.
I am enthusiastic about web design and development and all of my work, along with my portfolio is stored in Ubuntu.
EDIT: I am using 12.04 LTS.