Thanks for your replies.
I managed to get it working after several attempts at reverting back to a restore point. That got me into windows but then had a few other problems like no network connection.
But in the end it's all working fine now.
Was really odd though :eek:
I've been using Win 7 RC for a few months now and this morning I turned on my pc but it won't boot up passed the login type screen. Will try and attatch a pic. It's the screen that has the "Ease of access button" on the left and the Stutdown/restart/sleep button on the right. I think...