Fix Api-ms-win-crt-runtime-l1-1-0.dll Error When Installing ESET Internet Security

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ESET Internet Security is a popular security software specifically designed for internet usage. It’s a comprehensive package developed by ESET antivirus that provides security on all ends. From the firewall to parental locks to webcam security, it ensures the device and its connection with the internet is secure at all times.

It’s a licensed software that you can download from the official website. However, people have reported facing errors during installation. This post will cover the common ESET Internet Security installation errors, including the DLL errors.

Common ESET Internet Security Installation Errors

Api-ms-win-crt-runtime-l1-1-0.dll Error

When you download the ESET Internet Security installer and try to install it, sometimes it can throw the Api-ms-win-crt-runtime-l1-1-0.dll Error. This is yet another DLL file error indicating either the file is missing or corrupted. The most likely explanation would be the file did not get downloaded or installed properly and doesn’t exist in the system.

This file is essential for programs that use them. It’s quite common and vulnerable, which is why it’s easier for it to be overwritten.

The simplest and quickest solution to this error is to download the relevant DLL file from this page available for free.

It’s important that you download the file from a trusted source, as there are many bogus DLL directories online. Those files can further complicate things and fail the purpose you’re trying to achieve by downloading internet security software.

Another common fix for DLL file errors is running System File Checker. Launch Command Prompt by pressing Windows + R and typing cmd and clicking okay. Then in the console type ‘sfc/scannow.’

Error 2878 (Other Security Products Were Found)

This error can occur while installing this utility and may have different languages on different machines. The underlying cause is an existing antivirus.

The simple solution is to locating that antivirus and uninstalling it. After all, you really just need one antivirus anyways.

If you’re unsure you even have an antivirus already, try ESET Uninstaller utility to look for the antivirus or look for it in Programs in Control Panel manually.

The existing antivirus may be blocking the installation of the ESET Internet Security utility and uninstalling it will allow you to continue.

Corrupt Header

The ‘header is corrupt’ error typically occurs when the user tries to extract the Zip files rather than letting the installer do it. Don’t extract any folders downloaded manually. When the file successfully downloaded from the website, double-click on the installer file with the ESET icon.

Installation Failure

Installation failure error can occur for a number of reasons:\

  • Failed internet connection
  • Existing antivirus blocking
  • Malware
  • Installer fails

Apply the solution for each of the possible causes one by one and try installing again.

  • Check your internet connection to ensure it’s working properly
  • Check internet proxy values if they are incorrect
  • Disable existing antivirus or uninstall completely
  • Check for malware by running ESET online malware scan
  • Restart your PC and try installing again

These quick solutions should likely fix the installation errors.

Error 1618 (Installation has been interrupted)

This error occurs when you try installing ESET Internet Security while Windows is completing some other installations in the background. It may only be active in the background, and you may not even know about it.

The solution is to wait for those Windows installations to complete. Then restart the PC and then try installing the program.

Alternatively, you can end other installation directly from the Task Manager if you think those installations can be done later or are simply unimportant.

Error Code MSI.1406 or MSI.1303

This error occurs when the installation is completed but not successfully, so you can’t run the utility. This is often because of some system permission issues.

Make sure to run the installer as an administrator, so it has all the system permissions. Simply uninstall the software, and install it again by right-clicking on the installer file and click ‘Run as Administrator.’


Whether it’s the DLL error or any other error during ESET Internet Security Installation, you can easily resolve following the above solutions. ESET is a reliable anti-virus company and their internet security solution is one of the best in the market.

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