What Is ‘api-ms-win-crt-runtime-l1-1-0.dll’ Issue

Upon updating iTunes to the newest release, Windows people commonly see the problem “api-ms-win-crt-runtime-l1-1-0.dll is unavailable.” The majority of people who are afflicted by this problem are not able to access iTunes.

According to our research, the problem has indeed been present for a few years and appears to return everytime Apple issues a fresh iTunes version. However the api-ms-win-crt-runtime-l1-1-0.dll file may be found in at minimum of three places, it appears that maybe one under Programme Documents / iTunes is causing problems.

DLLs, are a form of indirect storing item that is needed to hold portions of programmes or applications and allows them to function on most any os. The app or tools locates the indirect module and packs it into cache just so the programme may start.

If certain DLL components are lacking or damaged, the OS will be unable to execute the code, culminating in an alert warning being shown.


Whenever you try to launch a software or a document on your Windows laptop and receive the following alert message: The application can’t start due api-ms-win-crt-runtime-l1-1-0.dll is absent from one’s system. To resolve this issue, attempt reloading the software; it might be really inconvenient.

Read Also:

  1. Steam Download Slow
  2. Twitch Error 2000

Microsoft Visual C++ Redistributable  includes the api-ms-win-crt-runtime-l1-1-0.dll module. You may run into this issue because there is no such programme or whether your current one would be lacking, obsolete, or destroyed.

Dynamic Link Library (DLL) files are crucial for the smooth functioning of Windows applications. Among them, the api-ms-win-crt-runtime-l1-1-0.dll often pops up in discussions and error messages. In this guide, we’ll uncover the significance of this DLL, its common issues, and provide actionable solutions.

What is api-ms-win-crt-runtime-l1-1-0.dll?

The api-ms-win-crt-runtime-l1-1-0.dll is a part of the Microsoft Visual C++ Redistributable for Visual Studio and is associated with the Universal CRT (C Runtime).

It provides critical routines such as input/output, memory management, and math computation essential for programs developed with Visual C++.

What Causes the api-ms-win-crt-runtime-l1-1-0.dll Issue?

Several triggers can lead to errors related to this DLL file:

  • Corrupted Files: A corrupted or missing api-ms-win-crt-runtime-l1-1-0.dll can prompt errors during the execution of associated programs.
  • Software Clash: Sometimes, multiple software installations can overwrite the existing DLL versions with newer or older ones.
  • Malware: Malicious software might disguise itself with a similar name or corrupt the original DLL file.

Fix: api-ms-win-crt-runtime-l1-1-0.dll is Missing Error

If you’re having trouble doing this, the techniques listed below may be of assistance. We’ve found and curated a list of remedies that already fixed the “api-ms-win-crt-runtime-l1-1-0.dll is unavailable” problem for people in the same position.

Run the following command in the following format unless you find a solution that works for your circumstance. Let’s get started!

Method 1: Replacing api-ms-win-crt-runtime-l1-1-0.dll With a Local Copy (Temporary Fix)

This api-ms-win-crt-runtime-l1-1-0.dll component could be located in numerous locations, as numerous customers have highlighted forth.

A few customers have complained that substituting the “api-ms-win-crt-runtime-l1-1-0.dll component from Programme Files / iTunes with such a duplicate of Programme Folders / General Files / Apple / Apple App Support” fixed the “api-ms-win-crt-runtime-l1-1-0.dll is unavailable” problem.

According to other clients, this workaround only succeeds if individuals access all of the Folders through the Apple App Support folder. Beware that, whilst the approach has a strong possibility of working, many individuals have complained that the solution is just transitory.

Any moment this DLL package is changed, the situation occurs to recur. If the problem reappears after the subsequent update or you’re seeking into a more long-term solution, move on to the second procedure.

This is how to change the api-ms-win-crt-runtime-l1-1-0.dll package with a duplicate from your computer:

Step 1: Ensure iTunes and every other Apple-related process are terminated.

Step 2: Extract api-ms-win-crt-runtime-l1-1-0.dll as well as any other DLL component found in the current directory of Apple App Support into Programme Files / General Files / Apple / Apple Apps Support.

Step 3: Thereafter, go to Programs Files / iTunes and transfer all of the contents you already replicated there.

Step 4: Start iTunes and check if you can get it to work without the “api-ms-win-crt-runtime-l1-1-0.dll is missing” problem. Move down to Method if you’re still getting the same issue.

Method 2: Installing The Universal C Runtime Update

Many clients have reported that updating the Upgrade for Ubiquitous C Runtime in Wins fixed the “win-crt-runtime-l1-1-0.dll is unavailable” problem. Please remember that such an upgrade must be loaded instantly using WU (Wins Upgrade).

However, if you’ve a bunch of outstanding upgrades and need to fix the problem quickly, there is indeed a traditional means that will download only the upgrades that iTunes demands.

By removing the Ubiquitous C Runtime upgrade appropriate to particular Windows edition, you can repair the “win-crt-runtime-l1-1-0.dll is unavailable” inaccuracy:

Step 1: Pay a visit to the Ms Downloads Centres at this Ms main website .  Then, select the bundle that corresponds to your Windows edition and chassis.

Step 2: Pick your languages upon that following page then tap the Download panel to begin the install.

Step 3: Launch the installation when the upgrade has been acquired and continue the screened directions to deploy it on one’s machine.

Step 4: Restart your device after the setup is finished to determine whether the “win-crt-runtime-l1-1-0.dll is unavailable” problem has indeed been repaired.

Technique 3 should be used if you’re still having problems.

Method 3: Installing Visual C++ Redistributable for Visual Studio 2015

The win-crt-runtime-l1-1-0.dll package may not load with such a Wins installation, configuration settings upgrade, or normal upgrade, as several individuals have brought out. That may be a concern since some apps (such as iTunes) demand this specific executable component (win-crt-runtime-l1-1-0.dll) to work effectively.

Thankfully, the Visual C++ Redistributable for Visual Studio 2015 bundle contains all of the Folders required by iTunes.

Step 1: Visit the Ms Downloads page.

Step 2: Tap on the Download button.

Step 3: Hit Next after selecting x64 / x86(x32) as your machine component.

Step 4: The files should indeed begin for downloading.

Step 5: Whenever it’s finished, click doubly on the.exe item you acquired and continue the screened directions to accomplish the target.

Step 6: To test if the operation was effective, launch the very same programme or document.

Continue to the last procedure if acquiring the Visual C++ Redistributable with Visual Studio 2015 does not address the problem.

Method 4: Installing An Older iTunes Version

Other customers who tried the preceding workarounds and still got the “win-crt-runtime-l1-1-0.dll is unavailable” problem were only able to get around it by downloading a previous iTunes edition.

Nevertheless, this procedure is not quite as simple as one might hope, because the downgrading will not work until the owner eliminates all Apple-touched components.

To delete every Apple-touched components and load an earlier edition of iTunes, read the instructions elsewhere here:

Step 1: To launch a Run panel, push Wins key Plus R. To launch Programmes and Characteristics, input “appwiz.cpl” and press Enter.

Step 2: To help ensure we’re deleting whatever software authorized by Apple Inc., click the Publishers tab at the upper edge of the section in Programmes and Functions.

Step 3: Eliminate all Apple Inc.-signed applications in a structured manner by rightly-clicking on those and selecting Uninstaller. Restart your device after you’ve deleted any Apple-signed applications.

Step 4: Access this actual site  at the subsequent startup and keep scrolling towards the iTunes installation area.

Step 5: Furthermore, to begin the install, open the website linked with just a previous iteration.

Step 6: To download the earlier edition of iTunes onto one’s PC, launch the iTunes application and read the instructions. Reset your machine when the setup is finished to determine if the “win-crt-runtime-l1-1-0.dll is unavailable” problem was being fixed.

How to Reset a DLL?

Resetting a DLL essentially means restoring it to its original state or version. Here’s how:

  • System File Checker: Windows has a built-in tool called System File Checker (SFC). Running sfc /scannow in the Command Prompt (admin) can scan for corrupted files and restore them.
  • Reinstallation: For specific DLLs like api-ms-win-crt-runtime-l1-1-0.dll, reinstalling the Microsoft Visual C++ Redistributable package can restore the file to its correct version.

Manual Registration of a DLL in Windows

Sometimes, DLLs might need to be registered manually for applications to recognize them. Here’s a step-by-step process:

  1. Open Command Prompt as Administrator: Search for ‘cmd’ in the Windows search bar, right-click on ‘Command Prompt’, and select ‘Run as administrator’.
  2. Navigate to the DLL Location: Use the cd command to navigate to the directory where the DLL is located.
  3. Register the DLL: Type regsvr32 yourfilename.dll and press Enter. For deregistration, use regsvr32 /u yourfilename.dll.

Also Read:

  1. MacBook Problems
  2. Torlock
  3. PS4 Won’t Turn On
  4. BravoTV Com Link Activate


DLL challenges are compounded by lost or broken components, and they may be readily fixed with the solutions given previously. If everything else goes wrong, a fresh setup of one’s Windows OS or consulting an expert to assist you solve the problem are your only options.

After doing any of those procedures, the lacking api-ms-win-crt-runtime-l1-1-0.dll problem should indeed be entirely resolved. Whether you have started installing or upgraded Wins on your system, the problem “api-ms-win-crt-runtime-l1-1-0.dll unavailable” is far more likely to occur.

I’ve provided several fast tweaks and remedies for this problem that are quite simple to implement. To utilise these techniques to fix this problem, you do not even need to become a techie whiz.

The api-ms-win-crt-runtime-l1-1-0.dll is a pivotal component for many Windows programs. Errors associated with it can be frustrating, but with a deeper understanding and the right tools, they’re manageable.

Always remember to back up your data and maintain regular system checks to preemptively tackle such issues.