How to Fix DLL missing (Various Windows applications)
Quick Answer
The "DLL missing" error indicates that a Dynamic Link Library (.dll) file required by a program cannot be located by the operating system. This often prevents the associated application from launching or functioning correctly. The fastest fix is typically to reinstall the program that is reporting the missing DLL.
What Causes This Error
- Accidental deletion of the DLL file.
- Corruption of the DLL file due to malware, disk errors, or improper shutdowns.
- Incorrect installation or uninstallation of software.
- Outdated or incompatible software drivers.
- Issues with the Windows Registry referencing a non-existent DLL.
- Problems with Windows system files.
Step-by-Step Fixes
1Reinstall the Program Reporting the DLL missing Error
- Open the 'Control Panel' on your Windows system.
- Navigate to 'Programs' then 'Programs and Features' (or 'Add or Remove Programs' on older Windows versions).
- Locate the program that is displaying the 'DLL missing' error in the list.
- Select the program and click 'Uninstall' (or 'Change/Remove'). Follow any on-screen prompts to complete the uninstallation.
- Restart your computer.
- Download the latest version of the program from its official website or use your original installation media.
- Install the program, ensuring all installation steps are followed correctly. Test the program to see if the error is resolved.
2Perform a System File Checker (SFC) Scan
- Press the 'Windows key + R' to open the Run dialog.
- Type 'cmd' and then press 'Ctrl + Shift + Enter' to open an elevated Command Prompt.
- If prompted by User Account Control, click 'Yes' to allow the application to make changes.
- In the Command Prompt window, type 'sfc /scannow' and press 'Enter'.
- Allow the scan to complete. This process can take several minutes. Do not close the window until the verification is 100% complete.
- Upon completion, review the scan results. If corrupted files were found and repaired, restart your computer and check if the DLL missing error persists.
3Update Your Device Drivers
- Press the 'Windows key + X' and select 'Device Manager' from the menu.
- In Device Manager, look for any devices with a yellow exclamation mark, which indicates a problem.
- Even without a warning, consider updating drivers for critical components like your graphics card, sound card, or network adapter, especially if the DLL error is related to a specific hardware function.
- Right-click on the device and select 'Update driver'.
- Choose 'Search automatically for updated driver software' and follow the on-screen instructions. Alternatively, visit the manufacturer's website for your specific device model to download and install the latest drivers manually.
- Restart your computer after updating drivers.
4Run a Full System Malware Scan
- Ensure your antivirus software is up to date with the latest virus definitions.
- Open your antivirus application.
- Initiate a full system scan. This type of scan can take a significant amount of time, sometimes several hours.
- Allow the scan to complete and follow any instructions provided by the antivirus software to quarantine or remove detected threats.
- Restart your computer after the scan and removal process. Malware can sometimes delete or corrupt DLL files, leading to these errors.
Advanced Fixes
Restore Your System to a Previous Point
- Press the 'Windows key + R' to open the Run dialog.
- Type 'rstrui.exe' and press 'Enter' to open System Restore.
- Click 'Next' on the System Restore wizard.
- Select a restore point from the list that predates the appearance of the 'DLL missing' error. If no restore points are visible, check the 'Show more restore points' box.
- Click 'Next' and then 'Finish' to confirm your choice. Your computer will restart and revert to the selected state.
- After the system restore is complete, check if the program now runs without the DLL error.
Manually Register the DLL File (If Applicable)
- Note: This fix is only applicable if you have obtained the missing DLL file from a trusted source and it is designed to be registered.
- Place the downloaded DLL file into the correct system directory. For 32-bit DLLs on a 64-bit system, this is usually 'C:\Windows\SysWOW64'. For 64-bit DLLs or 32-bit DLLs on a 32-bit system, it's typically 'C:\Windows\System32'.
- Press the 'Windows key + R' to open the Run dialog.
- Type 'cmd' and then press 'Ctrl + Shift + Enter' to open an elevated Command Prompt.
- In the Command Prompt, type 'regsvr32 [DLL_NAME].dll' (replace '[DLL_NAME].dll' with the actual name of your DLL file, e.g., 'regsvr32 example.dll') and press 'Enter'.
- A confirmation message stating 'DllRegisterServer in [DLL_NAME].dll succeeded' should appear. Click 'OK'.
- Restart your computer and test the program.
Frequently Asked Questions
What is a DLL file?
A DLL (Dynamic Link Library) file is a type of file that contains code and data that can be used by multiple programs simultaneously. It allows programs to share common functions, reducing memory usage and making software more modular.
Is it safe to download missing DLL files from the internet?
Downloading DLL files from unofficial websites is generally not recommended. These files can be outdated, incompatible, or even contain malware. It is always safer to obtain DLLs through official software reinstallation, Windows updates, or trusted vendor websites.
Can a virus cause a DLL missing error?
Yes, malware, viruses, or other malicious software can corrupt, delete, or interfere with legitimate DLL files, leading to 'DLL missing' errors. Running a comprehensive antivirus scan is an important troubleshooting step.
Why does reinstalling the program often fix the DLL missing error?
Reinstalling the program typically replaces all its necessary files, including any DLLs that might have been deleted, corrupted, or were never properly installed. This ensures that the program has all the components it needs to run correctly.