Windows not starting successfully.

Question

My Compaq nx6110 turns on but stops on a black screen with white writing. It says "Windows did not start successfully. A recent hardware or software change might have caused this." It then has 5 options - Safe ModeSafe Mode with NetworkingSafe Mode with Command PromptLast Known Good ConfigurationStart Windows NormallyI have tried all 5 options but it always reverts to this screen again after briefly being on the 'Windows xp loading screen'.Can anybody help? Thanks!