If all else fails, the Steam client itself may be corrupted. You can reinstall it without losing your games.
Under the tab, check Run this program in compatibility mode for: and select Windows 8 or Windows 7 . could not initialize steam naruto ultimate ninja storm 3
If you're stuck at the startup screen, try these proven fixes in order: If all else fails, the Steam client itself may be corrupted
Sometimes the Steam client itself is stuck in a partial state. If all else fails