Speed Up Your Drive with Disk Defragmenter Under Windows Me, the Disk Defragmenter does more than simply group together the disparate parts of files. It also has a new technology that reorders the clusters of the program files you use the most so that the programs will run faster. Some programs (most notably Microsoft Office programs) tend to start up considerably faster after you defrag. The first time you run Defrag, you'll see an optimization wizard that sets up a log of program usage to aid in speeding up the programs you use most often.