I've checked it out and i'm impressed. A very neat and nicely written program.

How is it compared to JKDefrag?

Win95 & 98 had a very similar programme to defrag files but it was very slow, infact you could be watching over it all night quite seriously. The Window version however gave the programmer an insight into what was happenning on the hard drives. This version of Defragler will give more or less the same information as before and is so quick, no more using matchsticks to keep your eyes open all night. God bless you programme compilers.

I love this app! My newish Liteon dvd burner has a skittish buffer, and making sure my files are de-fragged before burning helps keep the fluctuations to a minimum. (resulting burns sometimes skipped and pixilated).
No more ages of defragging a big 250 gb drive --- Now I just defrag the selected video files, and burn with confidence.

I packaged up a U3 version of Defraggler as well for download here if anyone uses a U3 USB drive: http://www.ccleanerdownload.org/ccleaner-211-for-u3-enabled-usb-drives

crashes in vmware workstation wxpsp3 :-(

You can save space and reduce the clutter if you delete all the lang*.dll files. To make defraggler write it's settings to an ini file go to Settings > Options > and check "Save all settings to ini file". You may also want to disable updates uncheck "Automatically Check for updates to Defraggler".

EXTREMELY limited. Why would anyone pick this over Jkdefrag? My guess is, the prettier interface. But when it comes to issues of performance, does an interface really matter? Just start the program and walk away. Or in the case of Defraggler, just walk away.

@AncientImages: I am also an Jkdefrag User. But Defraggler is able to defrag single Folders.

The instructions to 'install' as a portable application are not complete. If you check out the link on the help pages of the Defraggler website -- http://docs.piriform.com/defraggler/advanced-usage/running-defraggler-from-a-usb-drive -- you find that you are directed to create a file named portable.dat in the same folder as the folder used to extract the zipped archive. This 'forces' the use of the INI file to store settings. By the way, great application!

Defrag v.1.08 don't remember splited parts of window!!!

One of my favorite defragmenters. I like how it defragments only the files that really need it.

Defraggler is really great. Fast,efficient and nice looking.
And you can defragment a single file if you have no time to wait. What else can I say,great job Piriform:)

seems to work ok with win xp. got system slowdowns after defragging in win 7 x64,though...default win7 defrag seems to work much better

F.Y.I

For English users with x64Bit OS:
You can delete everything except 'Defraggler64.exe', 'portable.dat', and '1033' language file.

i don't know what 'df.exe', and 'df64.exe' are for, but i just defragged my HDs and they weren't needed. ?

@Magibon

lang-1033.dll is only needed if your system default isn't English. df.exe is the commandline version.

@ Baas

thank you, for the explanation!

i can now delete the entire language folder :)

Version 2.3.0.282 doesn't recognize my 'Exclude' list. 2.2.0.253 does. Hmmm...

slowly, i have grown to love this app.
i love the ability to defrag only the fragmented files: it saves so much time.

in addition, no apparent problems with Windows 7 recognizing where the files are placed, a problem i had with other 3rd party defrag apps. in the past.

What a light, usable, and most important, practical!

Is it just me, or does version 2.4.0.297 ignore files in the Exclude list. I added *.dbx to ignore Outlook Express files, but they show up anyway in the list of fragmented files. Version 2.2.0.253 ignores those files, as it should.

The simplicity and speed of this program is great. And I like how it lists which files are fragmented, so I get a clue of which programs are fussing with the disk most recently. I've tried other programs like JKdefrag and MyDefrag and WinContig and some others and this one seems to work with Windows the best. Additionally, I think that defragmenting only files and not free space makes the most sense for an operating system disk that's constantly being written to.

portafreeuser: thanks for that breakdown

@webfork, you're welcome but bear in mind that one of the recent versions has been slower than the previous versions on my XP SP3 System even though it is a good program. I temporarily changed back to a previous version and to WinContig. I also may have had a program crash on a recent version before this last version, but my comment was removed by moderators for some reason that was not explained to me. Hopefully this latest release is faster and more stable than the previous update(s).

@webfork and other, Nevermind my previous comment. I made a mistake. Sorry Oops. I got this program and WinContig mixed up.

This program version runs just fine. I just tested it too. Sorry about the mix up.

Instructions say to remove unnecessary language files, how do you tell when they are numbered, not named?
Also suggest remove either 32, or 64 bit files which are bundled.

@rogerthedodger

I believe Piriform uses standard LCID (locale IDs), English US (1033), English UK (2057), and so on.

... see http://msdn.microsoft.com/en-us/goglobal/bb895996.aspx for more LCIDs

Sorry, I should be a bit more clear...

Piriform uses LCIDs as defined by Microsoft
... http://msdn.microsoft.com/en-us/goglobal/bb964664 may offer a bit more info.

I'm not sure if Apple uses a similar system - useless FYI :)