Repair SDExt.dll DLL Issues (How to Download and Fix)

Last Updated: 11/24/2023
[Time Required for Reading: 3.5 minutes]

DLL files such as SDExt.dll are categorized as Win32 DLL (Dynamic link library) files. As a SDExt Module file, it was created for use in SDExt Module by Star Downloader.

The first version of SDExt.dll was released for the Windows 10 Operating System on 03/18/2006 inside Star Downloader Free 1.45. According to our records, this release is the only version of this file offered by Star Downloader.

In this short article, you will discover detailed file information, steps for troubleshooting DLL file problems with SDExt.dll, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information
File Name: SDExt.dll
File Extension: DLL file extension
Description: SDExt Module
Object File Type: Dynamic link library
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Program: SDExt Module
Legal Copyright: Copyright 2002
Developer: Star Downloader
Software: Star Downloader Free
Software Version: 1.45
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x3569
Code Size: 12288


What are SDExt.dll Error Messages?


Dynamic Link Library SDExt.dll Errors

SDExt.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like SDExt.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like OneDriveSetup.exe - to follow. These files were created so that multiple programs (eg. Star Downloader Free) could share the same SDExt.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when SDExt.dll is attempted to be loaded either when Star Downloader Free is starting up, or in some cases already running. Some of the most common SDExt.dll errors include:

Your SDExt.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Star Downloader Free), or deleted by a malware infection. Furthermore, SDExt.dll file corruption could be caused from a power outage when loading Star Downloader Free, system crash while loading SDExt.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.



How to Fix SDExt.dll 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 SDExt.dll 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 SDExt.dll error, please proceed to the Step 2 below.

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

You can uninstall Star Downloader Free 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 Star Downloader Free 1.45 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Star Downloader Free software.

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

Star Downloader Free 1.45

Star Downloader

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 SDExt.dll 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 SDExt.dll 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 SDExt.dll 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 SDExt.dll file version. We maintain a comprehensive database of 100% malware-free SDExt.dll files for every applicable version of Star Downloader Free. 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 SDExt.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Star Downloader Free folder location:
    Windows 10: C:\Program Files (x86)\Star Downloader\
  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 SDExt.dll 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 SDExt.dll Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying SDExt.dll to your appropriate Windows system directory. Star Downloader typically does not release Star Downloader Free DLL 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 SDExt.dll and all other DLL files for Star Downloader Free. An incorrectly installed DLL 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 SDExt.dll


DLL Files Related to SDExt.dll

File Name Description Software Program (Version) File Size (bytes) File Location
api-ms-win-core-namedp... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 18040 C:\Windows\inf\
UpdateRingSettings.dll Update Ring Settings Microsoft OneDrive (19.174.0902.0013) 241272 C:\Users\Tester\AppData\Local\
qwindows.dll C++ Application Development Framework Qt5 (5.11.1.0) 1171576 C:\Users\Tester\AppData\Local\
PresentationCore.ni.dll Dynamic Link Library Star Downloader Free 1.45 16565248 C:\Program Files\Common Files\microsoft shared\...
FileSyncShell.dll Microsoft OneDrive Shell Extension Microsoft OneDrive (19.174.0902.0013) 1288304 C:\Users\Tester\AppData\Local\Microsoft\Windows\

Other Files Related to SDExt.dll

File Name Description Software Program (Version) File Size (bytes) File Location
api-ms-win-core-heap-l... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 18248 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
api-ms-win-core-synch-... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 20088 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
EtwRTEventLog-Applicat... Microsoft Event Trace Log Star Downloader Free 1.45 1592 C:\Windows\System32\LogFiles\WMI\RtBackup\
EtwRTEventLog-System.etl Microsoft Event Trace Log Star Downloader Free 1.45 432 C:\Windows\System32\LogFiles\WMI\RtBackup\
PerfStringBackup.INI Windows Initialization Star Downloader Free 1.45 1321920 C:\Windows\System32\


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