Like the proverbial bad penny, the Diagnostic Tracking Service patch KB 3022345 appears to be corrupting Windows files — or at least, convincing Microsoft’s System File Checker SFC /scannow command ...
Update: This issue is now resolved in "Security Intelligence Update for Windows Defender Antivirus - KB2267602 (Version 1.301.1684.0)" definitions. Microsoft has released a new update for Windows ...