84,488,480 programs installed

Should I remove Defraggler?

What percent of users and experts removed it?
5% remove it95% keep it
Overall Sentiment
Very good
What do people think about it?
(click star to rate)
How common is it?
Global Rank #131
United States Rank #137
Reach 3.5993%
(Not enough data to show 30 day installation trends)
Uninstallation trends (last 30 days)
Lifespan of installation (until removal)
< 13.53 days
399.02 days >
Average installed length: 209.65 days


VersionDistribution 0.00%
2.22 0.26%
2.21 11.13%
2.20 1.64%
2.19 13.06%
2.18 19.58%
2.17 6.89%
2.16 8.05%
2.15.742 0.00%
2.15 8.12%
2.14 6.85%
2.13 5.41%
2.12 4.27%
2.11 2.73%
2.10.424 0.00%
2.10 3.48%
2.09 2.02%
2.08 1.08%
2.07 0.82%
2.06 0.67%
2.05 0.57%
2.04 0.35%
2.03 0.30%
2.02 0.42%
2.01 0.34%
2.00 0.50%
1.21 0.52%
1.20 0.20%
1.19 0.15%
1.18 0.15%
1.17 0.15%

Typically installed together


What is Defraggler?

Defraggler is a defragmentation utility which allows users to defragment individual files on their computer system. Defraggler can defragment individual files, groups of files (in a folder) or an entire disk partition, either by the user's command or automatically on a schedule. It supports FAT32, NTFS, and exFAT.

About  (from Piriform)

Use Defraggler to defrag your entire hard drive, or individual files - unique in the industry. This compact and portable Windows application supports NTFS and FAT32 file systems. Most defrag tools only allow you to defrag an entire drive. Defraggler lets you specify one or more files, folders, or the whole drive to de...  Read more


The most used version is 2.18, with over 98% of all installations currently using this version. During setup, the program registers itself to launch on boot through a Windows Schedule Task in order to automatically start-up. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The software is designed to connect to the Internet and adds a Windows Firewall exception in order to do so without being interfered with. When installed, it will add a context menu handler to the Windows shell in order to provide quick access to the program. The main program executable is defraggler.exe. The software installer includes 83 files and is usually about 10.53 MB (11,043,064 bytes).

Program detailsProgram details

URL: www.piriform.com/defraggler
Installation folder: C:\Program Files\Defraggler
Uninstaller: "C:\Program Files\Defraggler\uninst.exe"
Estimated size: 10.53 MB

Program filesFiles installed by Defraggler

Program executable:defraggler.exe
Path:C:\Program Files\defraggler\defraggler.exe
Additional files:
  • DefragglerShell.dll - DefragglerShell
  • DefragglerShell64.dll
  • Defraggler64.exe - Defraggler
  • df.exe
  • df64.exe
  • dfsetup116.exe - Defraggler Installer
  • dfsetup118.exe
  • dfsetup207.exe
  • dfsetup208.exe
  • dfsetup209.exe
  • dfsetup210.exe
  • dfsetup211.exe
  • dfsetup212.exe
  • dfsetup213.exe
  • dfsetup214.exe
  • dfsetup215.exe
  • dfsetup216.exe
  • dfsetup217.exe
  • dfsetup218.exe
  • uninst.exe
  • branding.dll - branding Dynamic Link Library

Program behaviorsBehaviors exhibited

2 Context Menu Handlers
  • DefragglerShell.dll added to Windows Explorer under the name 'DefragglerShellExtension' with a class of {4380C993-0C43-4E02-9A7A-0D40B6EA7590}.
  • DefragglerShell64.dll added to Windows Explorer under the name 'DefragglerShellExtension' with a class of {4380C993-0C43-4E02-9A7A-0D40B6EA7590}.
4 Scheduled Tasks
  • df64.exe is scheduled as a task named 'Defraggler Volume L Task' (runs weekly on Thursdays at 03:04).
  • Defraggler64.exe is scheduled as a task named 'defraggler' (runs weekly on Wednesdays at 8:24 AM).
  • Defraggler.exe is scheduled as a task named 'Defraggler' (runs weekly on Sundays at 3:27 AM).
  • df.exe is scheduled as a task named 'Defraggler Volume J Task' (runs monthly on Saturdays at 13:05).
2 Scheduled Tasks (Boot/Login)
  • df64.exe is automatically launched at startup through a scheduled task named Defraggler Volume C Task.
  • df.exe is automatically launched at startup through a scheduled task named Defraggler Volume C Task.
Windows Firewall Allowed Program
  • Defraggler.exe is added as a firewall exception for 'C:\Program Files\Defraggler\Defraggler.exe'.

Program resource utilizationResource utilization averages

Memory:10.8 MB
21.09 MB average
Total CPU:0.0972819169%
0.031193% average
Kernel CPU:0.01996755%
0.016088% average
User CPU:0.07731436%
0.015104% average
70 average
Memory:286.21 MB
Total CPU:0.0002480384%
Kernel CPU:0.00009888%
User CPU:0.00014916%
CPU cycles/sec:287,120,970
I/O reads/min:624.78 KB
I/O writes/min:44 Bytes

How do I remove Defraggler?

You can uninstall Defraggler from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Defraggler, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Defraggler.

Win 7 (SP1) 53%
Win 10 0%
Scheduled task? Yes
(Runs on Windows boot)
Uninstall it 5%
Keep it 95%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 55.45%
Windows 10 29.15%
Windows XP 8.31%
Windows Vista 7.06%
Windows Server 2003 0.03%
Which OS releases does it run on?
Windows 7 Home Premium 30.41%
Windows 7 Ultimate 12.03%
Windows 7 Professional 10.67%
Windows 10 Home 9.11%
Microsoft Windows XP 8.17%
Windows 8.1 6.53%

Distribution by countryGeography

50.60% of installs come from the United States
Which countries install it?
  United States 50.60%
  Germany 7.03%
  United Kingdom 5.40%
  France 4.62%
  Italy 4.34%
  Canada 2.90%
  Netherlands 1.71%
  Australia 1.56%
  Spain 1.39%
  Belgium 1.15%
  Brazil 1.03%
  Russia 0.93%
  Japan 0.89%
  Poland 0.87%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 26.03%
Dell 22.30%
Acer 16.98%
ASUS 10.76%
Toshiba 5.84%
Lenovo 3.65%
Samsung 3.43%
Intel 1.50%
American Megatrends 1.38%
Sahara 0.94%
Medion 0.79%
Common models
HP Pavilion dv6 Notebook ... 6.42%
HP Pavilion dv7 Notebook ... 5.83%
ASUS All Series 4.90%
HP Pavilion g6 Notebook P... 4.65%
HP Pavilion g7 Notebook P... 2.77%
Dell Inspiron 1545 2.03%

About Piriform

Piriform is develops software for the Microsoft Windows whose products include CCleaner, Recuva, Defraggler, and Speccy.
Publisher URL: www.piriform.com

comments2 comments

user comment
user comment
Sneetchover a year ago
Don't remove this, it is a good tool to use every couple months to clean up the HDD and make your computer just a bit faster.
expert comment
Stacy (Expert)over a year ago
It can also be installed as a portable application on a USB flash drive.