01-25-2012 03:49 PM
The 303 error would indicate that your Hard Drive is failing and will need to be replaced.
If your notebook is still under warranty, contact HP and arrange to have the drive replaced.
If you live in the US, contact HP Here.
If you are in another part of the world, start Here.
If you are out of warranty and would like a guide on replacing the Hard Drive yourself, please let me know - include the full Model No. and Product No. of the notebook ( from the service tag underneath your notebook ) - see Here for a further explanation.
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Microsoft MVP - Windows Experience