O & O Defrag 2000 Free - Version 3.5 562 A new disk defragmenter for Windows NT. It has an easy-to-learn graphical user interface and offers two methods of defragmenting FAT- and NTFS-partitions: SPACE is very quick and efficient; it is the first tool to take care of NT’s pagefile, and provides several features to make usage as easy as possible: automatic scheduling, cluster inspection, and detailed disk information.