When you say the loading of the system, do you mean the SuSE splash screen? Have you tried to look at the boot messages (press F2)? Could you post anything from this that looks as though it might be an error message.
My guess is that the root filesystem has got corrupted. If I'm right, then you should see some messages about this, advising that you run fsck. There's some detailed advice about what to do if this is the case in
this thread
Of course, its possible that I'm on completely the wrong track here. I won't be able to say for sure without seeing the boot messages.