Dfsetup221.exe EXE Errors: Download and Troubleshoot

Last Updated: 05/18/2020
[Time to Read: ~3-5 minutes]

EXE files such as dfsetup221.exe are categorized as Win32 EXE (Executable application) files. As a Defraggler Installer file, it was created for use in Defraggler by Piriform.

Dfsetup221.exe was first developed on 03/16/2016 for the Windows 10 Operating System in Defraggler 2.21.993. This file version is latest update offered from Piriform, according to our records.

This article discusses complete file details, EXE file troubleshooting instructions for problems with dfsetup221.exe, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)

Recommended Download: Fix dfsetup221.exe / Defraggler-related registry issues with WinThruster.

Compatible with Windows 10, 8, 7, Vista, XP and 2000

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File Overview

General Information
File Name: dfsetup221.exe
File Extension: EXE file extension
Description: Defraggler Installer
Object File Type: Executable application
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 © 2006-2016 Piriform Ltd
File Details
Character Set: Unicode
Language Code: Neutral
File Flags: (none)
File Flags Mask: 0x0000
Entry Point: 0x3a1c
Code Size: 29696

What are dfsetup221.exe Error Messages?

dfsetup221.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 dfsetup221.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, dfsetup221.exe runtime errors occurring while the program is running will result in the program terminating abnormally. Most of these dfsetup221.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 dfsetup221.exe errors include:

  • dfsetup221.exe - Bad Image.
  • dfsetup221.exe Application Error.
  • dfsetup221.exe could not be found.
  • dfsetup221.exe could not be installed.
  • dfsetup221.exe could not be launched. Class not registered.
  • dfsetup221.exe could not be started.
  • dfsetup221.exe failed to initialize properly.
  • dfsetup221.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
  • dfsetup221.exe is not a valid Win32 application.
  • dfsetup221.exe is not running.
  • Cannot find dfsetup221.exe.
  • Error starting program: dfsetup221.exe.
  • Faulting Application Path: dfsetup221.exe.
  • The file dfsetup221.exe is missing or corrupt.
  • Windows failed to start - dfsetup221.exe.
System Error

The program can’t start because dfsetup221.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 dfsetup221.exe error is key to properly resolving these errors. Although most of these EXE errors affecting dfsetup221.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 dfsetup221.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.

How to Fix dfsetup221.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 dfsetup221.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):

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

If the Step 1 fails to resolve the dfsetup221.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):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Defraggler 2.21.993 and click "Uninstall"
  5. 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


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 dfsetup221.exe error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

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

If Windows Update failed to resolve the dfsetup221.exe error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your dfsetup221.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 dfsetup221.exe file version. We maintain a comprehensive database of 100% malware-free dfsetup221.exe files for every applicable version of Defraggler. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download dfsetup221.exe Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Defraggler folder location:
    Windows 10: C:\Users\Tester\Downloads\
  4. 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 dfsetup221.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.

Download dfsetup221.exe Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying dfsetup221.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 dfsetup221.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.

Windows 10

Files Related to dfsetup221.exe

EXE Files Related to dfsetup221.exe

File Name Description Software Program (Version) File Size (bytes) File Location
dfsetup221.exe Defraggler Installer Defraggler 2.21.993 4529456 C:\Users\Tester\Downloads\
FileSyncConfig.exe Microsoft OneDrive Configuration Application Microsoft OneDrive (19.192.0926.0012) 364392 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
Defraggler64.exe Defraggler Defraggler ( 4440280 C:\Program Files\Defraggler\
FileCoAuth.exe Microsoft OneDriveFile Co-Authoring Executable Microsoft OneDrive (19.192.0926.0012) 506728 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
uninst.exe Defraggler Installer Defraggler 2.21.993 183368 C:\Program Files\Defraggler\

Other Files Related to dfsetup221.exe

File Name Description Software Program (Version) File Size (bytes) File Location
setupact.log Log Defraggler 2.21.993 62521 C:\Windows\Panther\UnattendGC\
SA.DAT Game Data Recuva 1.53.1087 6 C:\WINDOWS\Tasks\
setupapi.dev.log Log Recuva 1.53.1087 684126 C:\Windows\inf\
machine.PNF Precompiled INF Speccy 1.32.740 152316 C:\Windows\inf\
WmiApRpl.ini Windows Initialization CCleaner 5.61.7392 29736 C:\Windows\inf\WmiApRpl\0009\


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