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qico.dll

Updated: Files Available: 860
Verified Metadata AI Analysis x86 (32 bit) x86-64 (64 bit)

Download and install qico.dll to fix missing or corrupted DLL errors.

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DLL Overview

Last Updated
Jan 1st, 2026
Filename
qico.dll
Company
The Qt Company Ltd.
Product
Qt5
Description
C++ Application Development Framework
Architecture
x86 (32 bit) x86-64 (64 bit)
Metadata Consensus
513/860 Files 59.7%
Higher percentages indicate stronger agreement across versions. View available versions or browse repository metadata to compare differences between variants.

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About qico.dll

qico.dll is a DLL file (Dynamic Link Library) used by Windows programs to share code and resources. It allows multiple applications to use the same functions, improving performance and reducing redundancy.

Overview

The qico.dll file is a plugin developed by The Qt Company Ltd. as part of the Qt framework, which is a comprehensive C++ library for cross-platform application development. This plugin is specifically designed to handle ICO (icon) files within Qt applications, enabling the software to load and display icons stored in the ICO format, which is commonly used for icons in the Windows operating system.

The presence of the qico.dll plugin allows Qt applications to seamlessly integrate and use ICO files for various purposes, such as window icons, toolbar icons, and other graphical user interface elements. This ensures that applications developed with Qt can maintain a consistent and native look and feel across different platforms, especially when running on Windows.

If developers or users encounter issues with the qico.dll file, it might lead to problems with displaying icons in a Qt application, potentially resulting in missing or incorrectly rendered icons. This could affect the usability and aesthetic of the application.

To resolve issues related to qico.dll, developers should ensure that the Qt framework and the application using it are both up to date, as updates often include fixes for known bugs and improvements to the framework's capabilities. If the problem persists, reinstalling the Qt framework or the affected application might help by ensuring that all components, including the qico.dll plugin, are correctly installed. For application developers, verifying that the qico.dll plugin is correctly deployed with the application and that the application is configured to use the plugin for handling ICO files is also crucial. If issues continue, consulting Qt's documentation or seeking support from the Qt community forums may provide further troubleshooting insights or solutions.

File information is supported by Human Assisted Artificial Intelligence and should be used as a helpful tool. However, it is important to keep in mind that this information may not be up-to-date or entirely accurate.

Troubleshooting DLL Errors

Most errors involving qico.dll occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application or replacing the DLL resolves the issue. The steps below cover the most common and reliable ways to fix these errors.

Windows DLL Error Examples

This application has failed to start because qico.dll was not found. Re-installing the application may fix this problem.
qico.dll Not Found.

Fixes and Solutions

The first step in resolving DLL errors is to completely uninstall the affected software and reinstall its latest version. We know this does not always solve the problem, which is why DLLme exists. If reinstalling the application does not help, or if you are unsure which app is causing the error, follow the steps below. These are the most common solutions for fixing qico.dll errors.

  • Repair Windows: Make sure Windows is fully updated, then open Windows Terminal or PowerShell as an administrator (search for “PowerShell” in the Start menu, right-click it, and choose “Run as administrator”). This allows you to repair the Windows component store and run the System File Checker (SFC).

    Repair the Windows component store so SFC can pull clean files:

    DISM /Online /Cleanup-Image /RestoreHealth

    Scan all protected system files and automatically repair problems:

    sfc /scannow
  • Uninstall & Reinstall: On this DLL page, check the Company/Product section to identify the related app, then fully uninstall it. If you plan to continue using it, reinstall the latest version. Be sure to save or back up any important data before uninstalling. Windows or antivirus software may sometimes quarantine DLL files, especially if the DLL is unfamiliar or appears suspicious. Check your antivirus quarantine or logs to determine if this is the cause of your issue.
  • Download the DLL: Download the latest 32-bit or 64-bit version of the DLL directly from our repository using the download button above. Most users will need the 64-bit version, but if you are unsure, or if a 64-bit version is not available, you can install both the 32-bit and 64-bit DLLs. DLLme verifies DLLs that come from our admins, partners, and trusted affiliates. User-uploaded files may be verified later if a trusted source is confirmed.
  • Register the DLL: Most DLL files do not need registration, but some DLLs are COM components and must be registered to work correctly. If registration is required, open Windows Terminal or PowerShell as an administrator.

    Register the DLL (you can also drag the DLL file into the window to automatically fill in its full path):

    regsvr32 "C:\path\to\qico.dll"

    If you are registering a 32-bit DLL on 64-bit Windows, use the 32-bit RegSvr32:

    C:\Windows\SysWOW64\regsvr32 "C:\path\to\qico.dll"

    Or open Windows Terminal/PowerShell in the DLL’s folder and run:

    regsvr32 qico.dll

How to Install qico.dll

To install qico.dll, place the DLL file in the appropriate Windows system folder or in the same folder as the application’s .exe file. If you are not sure which version (32-bit or 64-bit) to use, you can safely install both.

On 64-bit versions of Windows, place 64-bit DLL files in:

C:\Windows\System32\qico.dll

Place 32-bit DLL files in:

C:\Windows\SysWOW64\qico.dll

Or place the DLL file next to the application’s .exe:

C:\path\to\exe\qico.dll

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