Disk fragmentation leads to system slowdowns, PC crashes, slow startup and shutdown and sometimes to system failures. Auslogics Disk Defrag is designed for fast optimization of today's modern hard disks. Get the maximum performance out of your expensive hardware investments. And it's absolutely FREE. Improve computer performance and stability Increase your productivity - no more waiting for files to open Defragment disks in only a few minutes Useful disk fragmentation map and detailed fragmentation report Windows XP Home and Professional, 2000/2003 and Vista supported Hard disks are by far the slowest component in your computer. CPU and memory work much faster than hard disks because they do not have moving parts. Therefore fragmented disks often become a bottleneck of the system performance. Besides causing slowdowns, fragmentation makes the hard drive disk heads move frequently when reading files which leads to freeze-ups and system crashes. It is important to keep your disks defragmented and optimized as much as possible.