My Ninja 3.0.3 also freezes and always after checking 91% of the files. Normal mode or debug mode makes no difference, Ninja has to be terminated “by force” and no error report is given. Only drive C: or only drive D: or only drive E: or all drives in one go makes no difference. My system: Windows 7 Pro 64. Previous Ninja worked fine. CCleaner runs fine. No faulty drive, corrupt files or other mishaps.