JkDefrag is a disk defragmenter and optimizer for Windows 2000/2003/XP/Vista/2008/X64. Completely automatic and very easy to use, fast, low overhead, with several optimization strategies, and can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows. Included are a Windows version, a commandline version (for scheduling by the task scheduler or for use from administrator scripts), a screensaver version, a DLL library (for use from programming languages), versions for Windows X64, and the complete sources.
Ugly and hardworking, JkDefrag is a program that only a developer or expert user could love. The application performs its single function: to defragment and optimize any disk. The interface uses the same color language as standard defrag utilities to represent clusters, but any attempt at visual nicety ends there. Instead, the progress screen of JkDefrag most resembles an 8-bit 8086 display error.
The JkDefrag download is a ZIP file containing three methods of accessing the same function: the Windows version we used, a command-line .exe, and a screensaver .exe. You can set a few options for the screensaver tool, such as the screensaver you want displayed. Apart from these items, there are no settings and little explanatory text within the program. Disk defragmentation is often a process left to chug away overnight; compared with this time frame, JkDefrag is a Japanese bullet train. We ran the program in the background while performing other tasks, and it completed its work in just over 2 hours.
Although JkDefrag worked well for us, we were a little disturbed that when we clicked on the executable, the program began the defrag process on our C:\ drive immediately. The developer states that the program will work on any device that Windows sees as an independent disk, but it is not clear how to point the program at anything in particular. Still, JkDefrag is an excellent tool but its almost total lack of interface options makes it appropriate only for expert users.
"Simple, Versatile, Effective, Stable"
Free. Reasonable "default" file defragment and optimization scheme. Command line options for greater control (not typically needed).
On some systems, when finished, the screen will show an empty area where other systems may show the "completed" file map. An trivial 'con'.
Do consider using the "screen saver" defrag method. This will remove the need to schedule a defragment task and will remove the "I should remember to defragment" mental ToDo. Setting it as the screen saver is reasonable for most general purpose Wind...
"Very good program."
It's surprisingly quick and easy to use.
It doesn't have a GUI interface, but it's really no problem, because it's very easy to use.
I like it very much, it attends to all my defragging needs.
"good good good"
other companies don't even know what the word "defrag" means.
as for the GUI, I guess I'll have to start learning how to work with command line(which is not at all why I have bought an OS for, otherwise why bother with an OS, might as well keep-on working in DOS!!!)
I have disable windows defrag and all the others went to the trash bin.
And if these guys can build this and give out a working apps for free, what are all the guys spend our money on?
"it works ok"
it is easy to use
IT WORKS ok
have not used it very long to know
"Love it Love it LOve IT"
Lightweight. Really fast for what it does. Got me lower on defrag that all the rest of the utilities I had run from WinXP Defrag to some fairly expensive utility suites. Love it
None. No problems at all
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Note: The review & comment are referred from CNet