How to Fix Cygwin1.dll Problems and Download Updates

Last Updated: 11/25/2023
[Time to Read Article: 5 minutes]

Cygwin® POSIX Emulation DLL files such as cygwin1.dll utilize the DLL file extension. This file is considered a Win32 DLL (Dynamic link library) file, and was first created by Apache Friends for the Cygwin software package.

The first version of cygwin1.dll for Any Video Converter 6.3.3 was seen on 06/13/2019 in Windows 10. The latest version update [v1.7.9] for XAMPP was 5.6.40 released on 03/08/2019.

Continue reading below to discover detailed file information, DLL file troubleshooting, and free downloads of several versions of cygwin1.dll.

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File Overview

General Information
File Name: cygwin1.dll
File Extension: DLL file extension
Description: Cygwin® POSIX Emulation DLL
Object File Type: Dynamic link library
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
Developer and Software Information
Software Developer: Red Hat
Software Program: Cygwin
Legal Copyright: Copyright © Red Hat, Inc. 1996-2011
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x6f960
Code Size: 1433088

What are cygwin1.dll Error Messages?

Dynamic Link Library cygwin1.dll Errors

cygwin1.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like cygwin1.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like replace.exe - to follow. These files were created so that multiple programs (eg. XAMPP) could share the same cygwin1.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 cygwin1.dll is attempted to be loaded either when XAMPP is starting up, or in some cases already running. Some of the most common cygwin1.dll errors include:

Your cygwin1.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with XAMPP), or deleted by a malware infection. Furthermore, cygwin1.dll file corruption could be caused from a power outage when loading XAMPP, system crash while loading cygwin1.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 cygwin1.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 cygwin1.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 cygwin1.dll error, please proceed to the Step 2 below.

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

You can uninstall XAMPP 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 XAMPP 5.6.40 and click "Uninstall"
  5. Follow the prompts for uninstallation.

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

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

XAMPP 5.6.40

Apache Friends

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 cygwin1.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 cygwin1.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 cygwin1.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 cygwin1.dll file version. We maintain a comprehensive database of 100% malware-free cygwin1.dll files for every applicable version of XAMPP. 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 cygwin1.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate XAMPP folder location:
    Windows 10: C:\Program Files (x86)\Exact Audio Copy\CDRDAO\
    Windows 10: C:\Program Files (x86)\Aura4You\Aura Video Converter\gnu\genisoimage\
    Windows 10: C:\Program Files (x86)\Aura4You\Aura Video Converter\gnu\
    Windows 10: C:\Program Files (x86)\Any Video to DVD Converter and Burner\encoder\
    Windows 10: C:\Dev-Pas\Bin\
    Show 8 more directories +
    Windows 10: C:\Program Files (x86)\Anvsoft\Any Video Converter\gnu\
    Windows 10: C:\xampp\webalizer\
    Windows 10: C:\Program Files (x86)\WM Converter\
    Windows 10: C:\Program Files (x86)\WM Converter\DA\
    Windows 10: C:\Program Files (x86)\IDM Computer Solutions\UltraEdit\GNU\sort\
    Windows 10: C:\Program Files (x86)\SourceTec\Sothink Movie DVD Maker\Encoder\
    Windows 10: C:\testdisk-6.14-WIP\
    Windows 10: C:\Program Files (x86)\Varamozhi Editor\bin\
  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 cygwin1.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 cygwin1.dll Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying cygwin1.dll to your appropriate Windows system directory. Apache Friends typically does not release XAMPP 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 cygwin1.dll and all other DLL files for XAMPP. 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

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DLL Files Related to cygwin1.dll

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vcamp140.dll Microsoft® C++ AMP Runtime Microsoft® Visual Studio® 2017 (14.22.27810.0) 356912 C:\Program Files (x86)\Common Files\microsoft s...
mercuryb.dll Mercury/32 HTTP Server Module v4.62 XAMPP 5.6.40 158720 C:\Users\Tester\AppData\Local\Microsoft\Windows...
php_soap.dll SOAP PHP (5.6.40) 285184 C:\Users\Tester\AppData\Local\Packages\Microsof...
php_imap.dll IMAP PHP (5.6.40) 911360 C:\Users\Tester\AppData\Local\Packages\Microsof...
ReadKey.dll Dynamic Link Library XAMPP 5.6.40 26112 C:\Users\Bill Gates\AppData\Local\Packages\Juni...

Other Files Related to cygwin1.dll

File Name Description Software Program (Version) File Size (bytes) File Location
diagwrn.xml Extensible Markup Language XAMPP 5.6.40 44683 C:\Windows\Panther\UnattendGC\
diagerr.xml Extensible Markup Language XAMPP 5.6.40 44109 C:\Windows\Panther\UnattendGC\
api-ms-win-core-memory... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 11624 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
EtwRTDiagLog.etl Microsoft Event Trace Log XAMPP 5.6.40 1320 C:\Windows\System32\LogFiles\WMI\RtBackup\
ntuser.dat Game Data XAMPP 5.6.40 1310720 C:\Users\Tester\


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