HDD Health is a full-featured failure-prediction agent for machines using Windows. Sitting in the system tray, it monitors hard disks and alerts you to impending failure. The program uses Self Monitoring and Reporting Technology (S.M.A.R.T.) built into all new hard disks, and can predict failures on your hard drives. A host of alerting features include e-mail, local pop-up messages, net messages, and event logging.