Have you ever met the error: The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer” when launching an application in Windows? Do you know how to fix this error? This post would like to give you positive answers.

What Is “api-ms-win-crt-runtime-l1-1-0.dll”?

Before introducing “api-ms-win-crt-runtime-l1-1-0.dll”, let’s talk about DLL.

DLL is the abbreviation of Dynamic Link Library and it is a type of software file. In Windows, many applications are incomplete and inexecutable. They are split into some relatively independent Dynamic Link Library files in Windows. At the time you launch one application, the corresponding DLL file will come into use.

That is to say, a DLL file allows a program to split its various components into different modules so that applications can add or remove some of them to include or exclude some functionalities. This function makes a program cost less space because they do not need the entire DLL file.

DLLs can be divided into two types: load-time dynamic linking and run-time dynamic linking. api-ms-win-crt-runtime-l1-1-0.dll obviously belongs to the run-time dynamic linking. It is considered as an essential file of Windows operating system. A set of procedures and driver functions provided by it can be applied to Windows.

As api-ms-win-crt-runtime-l1-1-0.dll is closely related to Windows operating system, once the DLL file is missing, Windows OS will report this error “The program can’t start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer.” when running programs.

What Causes “api-ms-win-crt-runtime-l1-1-0.dll missing” Error?

When you try to launch an application or program such as Microsoft Office and Adobe applications, you may receive an error: “The program can’t start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer. Try reinstalling the program to fix this program.”

error: api-ms-win-crt-runtime-l1-1-0.dll missing

It is troublesome to face this error if you are urgent to use this application.

But do you know what caused this error? There mainly come three reasons:

  1. As a part of the Visual C++ Redistributable, Universal C Runtime (CRT) has failed to properly install.
  2. The api-ms-win-crt-runtime-l1-1-0.dll file is supposed to be included in Microsoft Visual C++ Redistributable for Visual Studio 2015. But your computer doesn’t have this software.
  3. The existing Microsoft Visual C++ Redistributable for Visual Studio 2015 is missing or gets corrupted.

Therefore, if you want to fix this error, you can take these three causes into considerations.

Back up System with MiniTool ShadowMaker

Since all these ways mentioned above are concerned with Windows operating system, it is possible that you may cause sudden system crash because of accidental operations. Therefore, it is necessary to back up your system in advance to prevent sudden system breakdown.

You may need to seek help from third-party software. As for third-party backup software, MiniTool ShadowMaker is a good choice to help you perform system backup in an easy and effective way.

MiniTool ShadowMaker is a backup master which allows you to back up everything you want, including the operating system, files and folders and even partitions and disks. It helps you create backup images in advance and you can restore them to the previous state if needed.

Apart from powerful backup functions, MiniTool ShadowMaker also supports file sync to save copies to different locations and encourages users to create bootable media.

You can also clone a hard disk to a smaller SSD disk to upgrade your hard drive and restore system to dissimilar hardware and so on.

Come and get MiniTool ShadowMaker Trial to have a free 30-day try.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

You can refer to detailed backup operations in the following part.

Step 1: Please launch MiniTool ShadowMaker Trial. Then select a local or remote computer to manage. Click Connect to enter its main page.

Tip: The remote computers you select must be on the same LAN and this function is only available from MiniTool ShadowMaker Trial and other paid versions.

select a local or remote computer to connect to manage

Step 2: Go to the Backup page and select the system related partitions under the Source tab.

Tip: You can select files, folders, partitions or disks under the Source tab to back up in accordance with your actual needs.

select system related partitions to back up

Step 3: Please select a destination path for your backups under the Destination tab. There are five destination paths available: Administrator (user’s name), Libraries, Computer, Network and Shared.

select computer as the destination path

Tip: It is recommended for you to save system backup images to an external hard drive and the hard drive is supposed to be larger than the total space of system related partitions.

Kind Remind:

  1. Schedule feature allows you to set an automatic and regular backup task.
  2. Scheme feature select backup scheme, including Full Backup, Incremental Backup and Differential Backup.
  3. Options feature allows you to set advanced parameters for your backup.

Step 4: Go back to the Backup page, you can click Back up Now to perform an immediate backup or click Back up Later to postpone the backup task. If you choose to Back up Later, you need to go to the Manage page to finish this backup task.

choose to back up now or back up later

You can create bootable media with MiniTool ShadowMaker in advance. If you want to restore your Windows OS when accidents happen, you can directly enter MiniTool Recovery Environment from the bootable media. Then you can employ Restore function to restore the operating system to the previous state with its backup images.

Detailed operating process of system restore please refer to How to Restore Computer to Earlier Date in Windows 10/8/7 (2 Ways).

Six Ways to Fix “api-ms-win-crt-runtime-l1-1-0.dll missing” Error

As for api-ms-win-crt-runtime-l1-1-0.dll missing, it is not as difficult as you think if you master correct methods. The following parts will present you six approaches and you can adopt one way in accordance with your actual situations.

Re-Register the DLL File

As what has been mentioned above, the api-ms-win-crt-runtime-l1-1-0.dll file may get lost if you suffer “api-ms-win-crt-runtime-l1-1-0.dll missing” error.

However, on the one hand, if you find the DLL file is still on your computer but you keep receiving this error message when launching one application, you can try to re-register the DLL file.

On the other hand, if you find the DLL file missing, you can download api-ms-win-crt-runtime-l1-1-0.dll from the internet and save it to another place on the computer. Remember to download the latest version and make sure its source is approved.

But api-ms-win-crt-runtime-l1-1-0.dll download is very likely to prove to be upset. As a result, there comes with another five alternatives. Please go on reading.

Install Visual C++ Redistributable for Visual Studio 2015 from Windows Update

Windows has prepared Visual C++ Redistributable for Visual Studio 2015 itself and you can install it from the Windows snap-in tool – Windows Update.

Detailed instructions are listed as follows.

Step 1: Please type “check” in the Windows search box and click Check for updates to enter its main page.

type check for update in Windows search box

Step2: Under Windows Update, please click Check for updates and Windows will automatically detect the updates for you.

Windows automatically detects updates

Step 3: After installing updates, please restart Windows.

Step 4: Please launch the applications again. You’ve fixed the error if they are launched successfully. But if you still find that api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer, try other ways listed following.

Download Visual C++ Redistributable for Visual Studio 2015 from Microsoft

If installing Visual C++ Redistributable for Visual Studio 2015 via Windows Update still fails, please download Visual C++ Redistributable for Visual Studio 2015 from Microsoft official website.

Step 1: Please visit Microsoft official website.

visit Microsoft official website

Step 2: Please select one needed language and then click Download to check the system type x64 or x86(x32) according to actual needs. Then click Next to start downloading.

select a system type when downloading

Tip: If you are not sure about your computer system type, please type down “system” in the Windows search box and select “system information” to see your system type.

check your computer system type

Step 4: When finishing the downloading task, please install it in terms of its functions.

Step 5: Try launching the target application again. It is perfect to run it successfully. But if you still receive the corresponding error, please turn to the next solution.

Repair Visual C++ Redistributable for Visual Studio 2015 on Local Computer

If you already have Visual C++ Redistributable for Visual Studio 2015 on your computer, you can try to repair it on your computer instead.

Step 1: Please type down Control Panel in the Windows search box and click it to run.

 run control panel

Step 2: Please click Programs and Features by switching large icons to small icons.

click programs and features in control panel

Step 3: Please click Microsoft Visual C ++ 2015 Redistributable. Then click Change.

click Microsoft Visual C ++ 2015 Redistributable

Step 4: Then click Repair to start repairing.

Step 5: When prompted by User Account Control, please click Yes. Then you are supposed to complete the repair by following the screen guides.

Download the Update for Universal C Runtime from Microsoft

The Windows 10 Universal C Runtime (CRT) is considered as an essential component of Windows 10 operating system. It enables CRT functionality on the Windows operating system.

Update for Universal C Runtime allows desktop applications depending on Windows 10 Universal C Runtime release to run on earlier Windows operating systems, including Windows Server 2012 R2, Windows 8.1, Windows RT 8.1, Windows Server 2012, Windows 8, Windows RT, Windows Server 2008 R2 Service Pack 1 (SP1), Windows 7 SP1, Windows Server 2008 Service Pack 2 (SP2) and Windows Vista SP2.

How to get the update for Universal CRT? Please refer to the following two methods.

Option A: Get the update from Windows Update.

Option B: Download the update from Microsoft Download Center.

Step 1: Visit Microsoft Download Center official website.

Step 2: Please select a language and click Download.

download Windows Universal C Runtime

Step 3: Install it in accordance with its instructions.

Copy api-ms-win-crt-runtime-l1-1-0.dll File from Another PC

If all approaches mentioned above turn out be in vain, you can try this one: copy api-ms-win-crt-runtime-l1-1-0.dll file from another computer.

Tip: The computer you copy the DLL file must have the same Windows system with you.

Detailed operating steps are listed as follows.

Step 1: First of all, you still need to check your system details. Please go to Windows search box to type down “system information” to check the OS name and system type.

Step 2: Go to another PC with the same Windows system and press “Windows + E” keys simultaneously to open File Explorer.

open File Explorer on another PC

Step 3: Go to C:\Windows\System32. Type down api-ms-win-crt-runtime-l1-1-0.dll in the address bar and click Enter to search.

  1. If you find api-ms-win-crt-runtime-l1-1-0.dll file here, just go on copying.
  2. If you can’t find api-ms-win-crt-runtime-l1-1-0.dll file here, go to C:\Windows\SysWOW64 instead. Then type down api-ms-win-crt-runtime-l1-1-0.dll to search again.

search api-ms-win-crt-runtime-l1-1-0.dll in the address bar

Step 4: Paste the DLL file to the problem computer. Remember the target location should be the same as the original location.

Tip: Not every computer with the same Windows system has the DLL file you want. This method may not work.

MiniTool ShadowMaker helps you back up Windows operating system in advance so that you can fix “api-ms-win-crt-runtime-l1-1-0.dll missing” error without fear and worries.Click to Tweet


It is sometimes inevitable to meet “api-ms-win-crt-runtime-l1-1-0.dll missing” error when launching computer applications. Many of you may be at a loss when facing this problem. Hope these methods mentioned above can help you solve it.

If you have any question about MiniTool Shadow Maker, please contact us via [email protected].

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