Hi, I have been trialling since a few days the disk defragmenter in PCKeeper and found it to be very effective, albeit lacking some features (like file exclusions). It makes wonders on my 7 years old XP system which more responsive now. The rest of the tools are "so-so". I guess they got their defragmentation tool from a third party and would like to know which one. Has anyone seen a similar defragmenter ? One feature is that all folders are placed at the beginning of the drive and a huge empy space is also placed just after the folders. The rest is pretty well packed. IOBit Smart Defrag hare some similarities, but I find there is too many small non contiguous spaces after a full optimized defrag. Thanks. PS : sorry for posting in the wrong area and thanks for moving the post into the right one.