If the disk defragmenter that comes with the OS is unsuitable for you, check out the other defrag programs available in the market. If you Google for fully automatic defrag programs, you will find some really good options which include background mode, low free space defrag and the latest feature includes prevention of fragmentation in one of the popular programs.
Disk Defragmenter
Disk Defragmenter
Anti-virus, Disk defragmenter, Disk clean-up etc...
Disk Defragmenter
Disk Defragmenter is a very slow program on most computers so it is reccommended that you do not open programs while it is running, or else there is a high risk of crashing your computer. It makes disk defragmenter goes even slower, which would probablly result in crashing the computer.
Disk Defragmenter
Disk Defragmenter utility
Disk Defragmenter.
Notepad and disk defragmenter do not use the same resources. However, Notepad can be used to open disk defragmenter from the system file.
disk defragmenter
If you have a Windows system, there is already a disk defragmenter installed onto the computer. Just click on the Start button and in the search box enter "disk defrag". Click on the program labeled Disk Defragmenter. To be able to defrag a disk, you need administrator rights.
Depends on where it comes from. Disk defrag programs are generally system utility programs, however, you can download some disk defrag programs from websites. In the latter case, it would be considered application software.