Piriform Defraggler EXE df64.exe

Fix, Download, and Update Df64.exe

Last Updated: 12/18/2024
[Time to Read: ~3-5 minutes]

Defraggler files, such as df64.exe, are considered a type of Win64 EXE (Dynamic link library) file. They are associated with the EXE file extension, developed by Piriform for Defraggler.

The first version of df64.exe for Defraggler 2.21.993 was seen on 03/16/2016 in Windows 10. This file release marks the latest and most updated version from Piriform.

Continue reading below to discover detailed file information, EXE file troubleshooting, and free downloads of several versions of df64.exe.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	df64.exe
File Extension:	EXE file extension
Description:	Defraggler
Object File Type:	Dynamic link library
File Operating System:	Win32
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Piriform Ltd
Software Program:	Defraggler
Legal Copyright:	Copyright © 2007-2016 Piriform Ltd

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x4e484
Code Size:	994304

View Other df64.exe Information

File Info	Description
File Size:	1475 kB
File Modification Date/Time:	2019:12:09 17:04:18+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2016:03:01 10:09:18+00:00
PE Type:	PE32+
Linker Version:	10.0
Code Size:	994304
Initialized Data Size:	502272
Uninitialized Data Size:	0
Entry Point:	0x4e484
OS Version:	5.2
Image Version:	0.0
Subsystem Version:	5.2
Subsystem:	Windows command line
File Version Number:	2.21.0.993
Product Version Number:	2.21.0.993
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Win32
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Piriform Ltd
File Description:	Defraggler
File Version:	2.21.0.993
Internal Name:	Defraggler.exe
Legal Copyright:	Copyright © 2007-2016 Piriform Ltd
Product Name:	Defraggler
Product Version:	2.21.0.993

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are df64.exe Error Messages?

df64.exe Runtime Errors

Runtime errors are Defraggler errors that occur during "runtime". Runtime is pretty self-explanatory; it means that these EXE errors are triggered when df64.exe is attempted to be loaded either when Defraggler is starting up, or in some cases already running. Runtime errors are the most common form of EXE error you will encounter using Defraggler.

In most cases, df64.exe runtime errors occurring while the program is running will result in the program terminating abnormally. Most of these df64.exe error messages mean that Defraggler was either unable to locate this file on startup, or the file is corrupt, resulting in a prematurely-aborted startup process. Generally, Defraggler will be unable to start without resolving these errors.

Some of the most common df64.exe errors include:

df64.exe - Bad Image.
df64.exe Application Error.
df64.exe could not be found.
df64.exe could not be installed.
df64.exe could not be launched. Class not registered.
df64.exe could not be started.
df64.exe failed to initialize properly.
df64.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
df64.exe is not a valid Win32 application.
df64.exe is not running.
Cannot find df64.exe.
Error starting program: df64.exe.
Faulting Application Path: df64.exe.
The file df64.exe is missing or corrupt.
Windows failed to start - df64.exe.

System Error

The program can’t start because df64.exe is missing from your computer. Try reinstalling the program to fix this problem.

Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

Finding the source of the df64.exe error is key to properly resolving these errors. Although most of these EXE errors affecting df64.exe will happen during startup, occasionally you will encounter a runtime error while using Defraggler. This can occur due to poor programming on behalf of Piriform Ltd, conflicts with other software or 3rd-party plug-ins, or caused by damaged and outdated hardware. Also, these types of df64.exe errors can occur if it has been accidentally moved, deleted, or corrupted by a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix df64.exe Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your df64.exe issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the df64.exe error, please proceed to the Step 2 below.

Step 2: If recently installed Defraggler (or related software), uninstall then try reinstalling Defraggler software.

You can uninstall Defraggler software by following these instructions (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "Uninstall" and press "ENTER".
In the search results, find and click "Add or Remove Programs"
Find the entry for Defraggler 2.21.993 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Defraggler software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Defraggler 2.21.993

Piriform

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many df64.exe error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the df64.exe error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your df64.exe File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate df64.exe file version. We maintain a comprehensive database of 100% malware-free df64.exe files for every applicable version of Defraggler. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download df64.exe Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Defraggler folder location:

Windows 10: C:\Program Files\Defraggler\
Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve df64.exe problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download df64.exe Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying df64.exe to your appropriate Windows system directory. Piriform typically does not release Defraggler EXE files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing df64.exe and all other EXE files for Defraggler. An incorrectly installed EXE file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Defraggler 2.21.993

Defraggler 2.21.993

File Name

Software Version

File Version

Architecture

df64.exe

2.21.0.993

2.21.0.993

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Defraggler
Software Version:	2.21.0.993
File Version:	2.21.0.993
File Size:	1510616
File Date:	12/09/2019
MD5 Checksum:	0f7817f85e6626c2a71b2474e3d1db9e
SHA1 Checksum:	e768c27e49e528fda5bb5d456b9bd51eb4f380c3
SHA256 Checksum:	939972a1064e4f9c47e110ef52f3df25483a0ddd0f59764df4843c9d57a4d4a1
CRC32:
File Directory Location:	C:\Program Files\Defraggler\

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	0.0
Initialized Data Size:	502272
Linker Version:	10.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows command line
Subsystem Version:	5.2
File Modification Date/Time:	12/09/2019

Recommended Download (WinThruster): Optimize Your PC and Fix EXE File Association Errors.

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Files Related to df64.exe

EXE Files Related to df64.exe

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
FileCoAuth.exe	Microsoft OneDriveFile Co-Authoring Executable	Microsoft OneDrive (19.192.0926.0012)	506728	C:\Users\Tester\AppData\Local\Microsoft\Windows\
FileSyncHelper.exe	Microsoft OneDriveFileSyncHelper	Microsoft OneDrive (19.192.0926.0012)	2133352	C:\Users\Bill\AppData\Local\
Defraggler.exe	Defraggler	Defraggler (2.21.0.993)	3430104	C:\Program Files\WindowsApps\Microsoft.BingMaps...
df64.exe	Defraggler	Defraggler (2.21.0.993)	1510616	C:\Program Files\WindowsApps\Microsoft.BingMaps...
uninst.exe	Defraggler Installer	Defraggler 2.21.993	183368	C:\Program Files\Common Files\Microsoft Shared\...

Other Files Related to df64.exe

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
Sessions.xml	Extensible Markup Language	CCleaner 5.61.7392	5302698	C:\Windows\servicing\Sessions\
setupact.log	Log	CCleaner 5.61.7392	2025383	C:\Windows\Logs\DPX\
setupact.log	Log	Defraggler 2.21.993	21267	C:\Windows\System32\Sysprep\Panther\
setupact.log	Log	Speccy 1.32.740	24317	C:\Windows\System32\Sysprep\Panther\
api-ms-win-core-profil...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	17528	C:\Users\Tester\AppData\Local\Microsoft\OneDriv...

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