Over 98% of PC slowdowns and problems are caused by faulty settings, clutter and fragmentation that are the result of normal PC use. System Mechanic, the number one-selling PC tuneup software with over 18 million users worldwide, automatically checks, diagnoses and repairs your entire system, fixing errors and slowdowns and cleaning out clutter – so your PC operates smoothly, reliably, with internet speeds up to 300% faster. Then it proactively monitors your system, running repairs automatically to keep you at peak performance. System Mechanic Professional also includes antivirus, firewall, military strength data erasing and emergency recovery of accidentally deleted files, photos and more from PCs, cameras and removable drives. Can be installed on up to three PCs.