What does Disk Defrag do? The problem:You may be experiencing longer application startup times or a general slowdown and believe disk fragmentation may be behind it. You want more than just a simple defrag to ensure your drives' optimal performance. The solution:Disk Defrag Ultimate lets you defrag files that are inaccessible during system operation, as well as optimize file placement on your hard drive to ensure faster access and most efficient operation. The multiple scheduling options let you easily maintain consistently high HDD speed. Why Disk Defrag Ultimate? 3-PC license Install and use the program on up to 3 PCs with just one license ? get all your hard drives optimized for top speed! Adapts to your needs The smart algorithms and multiple scheduling options let you customize your defrags to match your PC usage style and requirements. Industry-acknowledged quality Exclusive Auslogics technology is proven safe and effective in multiple tests, used by PC manufacturers and recommended by experts.