ext-ms-win-ntos-ksecurity-l1-1-1.dll

How to fix the Ext-ms-win-ntos-ksecurity-l1-1-1.dll error?

First of all, it is worth understanding why a ext-ms-win-ntos-ksecurity-l1-1-1.dll file is missing and why ext-ms-win-ntos-ksecurity-l1-1-1.dll errors occur. It is widespread for users to encounter situations where software does not work due to flaws in .dll files.

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What is a DLL file, and why you receive DLL errors?

DLLs (Dynamic-Link Libraries) are shared libraries in Microsoft Windows, implemented by Microsoft Corporation. DLL files are just as important as files with an EXE extension, and DLL archives are simply impossible to implement without tools with .exe extension.:

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When Ext-ms-win-ntos-ksecurity-l1-1-1.dll is the missing error appears?

If you see these messages, you have some problems with Ext-ms-win-ntos-ksecurity-l1-1-1.dll:

• "The program can't start because Ext-ms-win-ntos-ksecurity-l1-1-1.dll is missing from your computer".
• "Ext-ms-win-ntos-ksecurity-l1-1-1.dll Missing".
• "Ext-ms-win-ntos-ksecurity-l1-1-1.dll Not Found".
• "Ext-ms-win-ntos-ksecurity-l1-1-1.dll is missing from your computer. Try reinstalling the program to fix this problem."
• "This application has failed to start because Ext-ms-win-ntos-ksecurity-l1-1-1.dll was not found. Reinstalling the application may fix this problem."

But what do we do when there are problems when running a program? In this case, a problem with Ext-ms-win-ntos-ksecurity-l1-1-1.dll. Here are a few ways to deal with this error quickly and permanently.:

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Method 1: Download Ext-ms-win-ntos-ksecurity-l1-1-1.dll and install it manually

First of all, you need to download Ext-ms-win-ntos-ksecurity-l1-1-1.dll to PC from our site.

• Copy the file to the program install directory after where it is missing the DLL file.
• Or move the DLL file to the directory of your System (C:\Windows\System32, and for a 64 bit in C:\Windows\SysWOW64\).
• Now you need to reboot the computer.

If this method does not help and you see the messages like these - "ext-ms-win-ntos-ksecurity-l1-1-1.dll Missing" or "ext-ms-win-ntos-ksecurity-l1-1-1.dll Not Found," check to the next step.

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Method 2: Fix Ext-ms-win-ntos-ksecurity-l1-1-1.dll automatically using the error fixing tool

As practice shows, the error is caused by an unintentionally deleted Ext-ms-win-ntos-ksecurity-l1-1-1.dll file, which forces applications to crash. Malicious programs and infections by them cause Ext-ms-win-ntos-ksecurity-l1-1-1.dll with the rest of the system files to get corrupted.

You can fix Ext-ms-win-ntos-ksecurity-l1-1-1.dll automatically using the error fixing tool! This kind of device is designed to repair corrupted/deleted files in Windows folders. Install it, run it, and the program will automatically fix your Ext-ms-win-ntos-ksecurity-l1-1-1.dll problems.

If this method does not help, check to the next step.

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Method 3: Install Or Reinstall The Microsoft Visual C ++ Redistributable Package

Ext-ms-win-ntos-ksecurity-l1-1-1.dll error can also appear because of Microsoft Visual C++ Redistributable Package. You should check for updates and reinstall the software. Use Windows Updates search for this action. When you find the Microsoft Visual C ++ Redistributable Package, you can update it or remove the outdated version and reinstall the program.

• Press the key with the Windows logo on the keyboard - select Control Panel - look through the categories - click on Uninstall.
• Check the version of Microsoft Visual C++ Redistributable - uninstall the older version.
• Repeat uninstallation with the rest of Microsoft Visual C++ Redistributable.
• You can install Visual C++ redistributable 2015 Redistribution Update 3 from the official Microsoft website.
• After downloading the installation file, run it and install it on your PC.
• Reboot the computer after successful installation.

If this method does not help, check to the next step.

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Method 4: Reinstall The Program

Once a particular program starts to fail due to a missing .DLL file, reinstall the program so that the problem is safely resolved.

If this method does not help, check to the next step.

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Method 5: Scan Your System For Malware And Viruses

System File Checker (SFC) is a utility in Windows that allows users to scan for corruptions in Windows system files and restore them. This guide describes how to run the System File Checker tool (SFC.exe) to scan your system files and to repair missing or corrupted system files (including .DLL files). If a Windows Resource Protection (WRP) file is missing or corrupted, Windows might not behave as expected. For example, some Windows functions might not work, or Windows might crash. The "sfc scannow" option is one of several specific switches available with the sfc command, the Command Prompt command used to run System File Checker. To run it, first open Command Prompt first by typing "command prompt" in Search, right-click on "Command Prompt", and then select "Run as administrator" from the drop-down menu to run Command Prompt with administrator privileges. You must run an elevated Command Prompt to be able to perform a SFC scan.

• Run a full system scan at the expense of an antivirus program. Do not rely only on Windows Defender. It is better to choose additional antivirus programs in parallel.
• After a threat is detected, you need to reinstall the program that shows this notification. In most cases, you need to reinstall the program so that the problem immediately disappears.
• Try to perform a restore at system startup if all the above steps didn't help.
• As a last resort, reinstall your Windows operating system.

In the Command Prompt window, type "sfc /scannow" and press Enter on the keyboard to execute this command. System File Checker will start and should take some time to complete the scan (about 15 minutes). Wait for the scanning process to complete and restart the computer to see if you still receive "The program can’t start because Ext-ms-win-ntos-ksecurity-l1-1-1.dll is missing from your computer" error.

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Method 6: Use a registry cleaner

Registry Cleaner is a powerful utility that can clean unnecessary files, fix registry problems, find out the causes of slow PC operation and eliminate them. The program is ideal for working on a PC. People with administrator rights can quickly scan and then clean a user's registry.

• Download the application to your Windows operating system.
• Now, install the program and run it. The utility will automatically clean and fix the problem areas of your computer.

If this method does not help, check to the next step.

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Frequently Asked Questions (FAQ)