UsefulRest (formerly Protector of Health). With permanent and long-term computer work, you are vulnerable to eyesight deterioration, back and hand pain, headaches and eye problems. Why endure this needless stress? In order to prevent these potential problems, most ergonomic experts advise taking regular, short breaks in computer work to relax the eyes, the hands, the wrists (vulnerable to carpal tunnel syndrome), shoulders, and back. But with heavy workloads and hyperfocus on work, we forget to take periodic breaks, and often ignore reminders. Protector of Health has an inexpensive solution to compel you, your fellow workers, children, and other loved ones to take that much-needed break. With Protector of Health software, you can program your computer to freeze when you want for periods up to fifteen minutes per hour.