Unfortunately, this isn't enough information to get a specific answer.
All you've basically said is, "it's broken". Can you get into Safe
Mode? Last Known Good Configuration? What changed between the time
things worked and the time they didn't?
Then do come back and repost with all necessary details. There are lots
of people reading this newsgroup who want to help you (like me), but
you have to give us something with which to work.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.