Have you ever tried running a Python program only to be stopped by an error mentioning “Api-Ms-Win-Crt-Runtime-L1-1-0.Dll”? It’s frustrating when your code won’t work because of a missing or faulty file.
But don’t worry—you’re not alone, and this problem has a straightforward fix. You’ll discover exactly what causes this error and how you can solve it quickly. Keep reading to get your Python projects back on track without wasting time or losing your patience.

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Cause Of Api-ms-win-crt-runtime-l1-1-0.dll Error
The Api-Ms-Win-Crt-Runtime-L1-1-0.dll error happens because the file is missing or corrupted. This file is part of the Microsoft Visual C++ Redistributable package, needed by Python and other programs. If this package is not installed or is outdated, Python shows this error.
Sometimes, Windows updates can remove or break this file. Also, installing software incorrectly can cause this problem. Running Python without the correct libraries leads to the error. Fixing it usually means reinstalling or repairing the Visual C++ Redistributable.

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Checking Visual C++ Redistributable
The Api-Ms-Win-Crt-Runtime-L1-1-0.dll error often happens when the Visual C++ Redistributable is missing or damaged. This package contains important files needed by many programs, including Python.
Check if the Visual C++ Redistributable is installed on your PC. You can do this by going to the Control Panel and looking under “Programs and Features.” If it is not there, you need to download and install it from Microsoft’s official site.
Make sure to install the version that matches your Windows system: 32-bit or 64-bit. Sometimes, reinstalling the package fixes the error if the files got corrupted.
Installing Missing Dll Files
Missing Api-Ms-Win-Crt-Runtime-L1-1-0.dll can cause Python errors. This DLL is part of the Microsoft Visual C++ Redistributable package. Installing this package often fixes the problem. Visit the official Microsoft website to download it safely.
Choose the version that matches your Windows system (32-bit or 64-bit). After downloading, run the installer and follow the steps. Restart your computer to complete the process.
If the error continues, place the DLL file directly in the Python folder or C:WindowsSystem32
. This helps Windows find the file easily. Always download DLL files from trusted sources to avoid security risks.
Updating Windows System Files
Updating your Windows system files can fix the Api-Ms-Win-Crt-Runtime-L1-1-0.dll Python error. This error often happens when some important files are missing or outdated. The easiest way to update these files is by installing the latest Windows updates. Go to Settings > Update & Security > Windows Update, then click Check for updates. Windows will download and install needed files automatically.
Sometimes, the Visual C++ Redistributable package is missing or broken. Downloading and installing the latest version from Microsoft’s official site helps. This package contains the runtime files needed by Python and other programs. Restart your computer after installing to make sure changes take effect.
Alternative Solutions For Python Users
Missing Api-Ms-Win-Crt-Runtime-L1-1-0.dll often means the Microsoft Visual C++ Redistributable is not installed or is corrupted. Download the latest version from the official Microsoft website and install it carefully. Restart your computer after installation for changes to take effect.
Using Windows Update can fix the problem by updating system files automatically. Check for updates and install any pending ones.
Another option is to run the System File Checker tool. Open Command Prompt as admin and type sfc /scannow
. This scans and repairs missing or damaged files.
Copying the missing DLL from a trusted computer to your system folder (C:WindowsSystem32
) can help. Be sure the file version matches your system.
Lastly, reinstalling Python may fix the error if it happened after a Python update or installation. Choose the right Python version for your Windows.

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Frequently Asked Questions
What Causes Api-ms-win-crt-runtime-l1-1-0.dll Python Error?
This error happens when the system lacks the required Visual C++ Redistributable files.
How Can I Fix Api-ms-win-crt-runtime-l1-1-0.dll Missing Error?
Download and install the latest Microsoft Visual C++ Redistributable package.
Does This Error Affect Python Program Execution?
Yes, missing this DLL stops Python programs from running correctly.
Can Reinstalling Python Solve This Dll Error?
Reinstalling Python might help but installing Visual C++ Redistributable is often needed.
Conclusion
Fixing the Api-Ms-Win-Crt-Runtime-L1-1-0. dll Python error is simple. Check your Visual C++ Redistributable installation first. Update or reinstall it to restore missing files. Restart your computer after changes. These steps solve most issues quickly. Stay patient while troubleshooting. Small fixes can prevent bigger problems later.
Keep your system and Python updated for smooth use. This error does not mean your code is wrong. Just a missing system file. Follow the tips here and get Python running well again.