How do I fix "vccorlib100_clr0400.dll is missing" error?

The quickest fix is to install the Microsoft Visual C++ Redistributable package. Download and install both x64 and x86 versions from the official Microsoft website: https://www.microsoft.com/en-us/download/details.aspx?id=26999. This will restore vccorlib100_clr0400.dll and all related runtime files.

Is it safe to download vccorlib100_clr0400.dll?

Yes, when downloaded from official sources. We recommend installing the official Microsoft Visual C++ 2010 Redistributable package instead of downloading individual DLL files. This ensures you get a digitally signed, verified file directly from Microsoft.

Where should I put vccorlib100_clr0400.dll?

For 64-bit applications, place in C:\Windows\System32. For 32-bit applications on 64-bit Windows, place in C:\Windows\SysWOW64. However, we strongly recommend using the official installer instead of manual placement.

Visual C++ Runtime Version 100.0.0.0

Fix vccorlib100_clr0400.dll Missing Error

Scanned: 2025-11-30

MD5 Verified

2.7M+ downloads

⚡ Quick Fix: Install Microsoft Visual C++ 2010 Redistributable

This is the recommended fix from Microsoft. It will restore vccorlib100_clr0400.dll and all related runtime files automatically.

Download Official Package From Microsoft.com

Common Error Messages

✗ The program can't start because vccorlib100_clr0400.dll is missing

✗ vccorlib100_clr0400.dll was not found

✗ The code execution cannot proceed because vccorlib100_clr0400.dll was not found

What is vccorlib100_clr0400.dll?

VCCORLIB100_CLR0400.DLL is part of the Microsoft Visual C++ 2010 Redistributable runtime library, providing essential runtime functions for C++ applications.

How to Fix "vccorlib100_clr0400.dll is missing" Error

1 Method 1: Install Visual C++ Redistributable (Recommended)

This is the safest and most effective solution. It installs all Visual C++ runtime files at once.

Download the Visual C++ Redistributable x64
Also download the x86 version (for 32-bit apps)
Run both installers
Restart your computer

2 Method 2: Run System File Checker

If the runtime package doesn't work, try repairing Windows system files:

sfc /scannow

Run this in Command Prompt (Admin)

Manual Download (Last Resort)

⚠️ Important Warning

Downloading individual DLL files is not recommended. We strongly advise using the official runtime package above. Only use manual download if the official method fails.

If you must manually place the file:
• 64-bit apps: C:\Windows\System32
• 32-bit apps on 64-bit Windows: C:\Windows\SysWOW64