How to Fix Msvcp100.dll Was Not Found

If you’ve encountered the error message stating that "msvcp100.dll was not found" while trying to open a program or run a game, you're not alone. This issue typically occurs when the system is missing a crucial Microsoft Visual C++ Redistributable file, which is essential for running applications developed with Visual C++. Fortunately, resolving this problem is straightforward with a few troubleshooting steps. In this guide, we will walk you through how to fix the "msvcp100.dll was not found" error effectively and safely.

How to Fix Msvcp100.dll Was Not Found

The "msvcp100.dll" file is part of the Microsoft Visual C++ 2010 Redistributable package. When this DLL file is missing, corrupted, or improperly installed, it can prevent programs from launching properly. Here’s a step-by-step approach to fix this issue:

1. Restart Your Computer

Before diving into more complex solutions, start with a simple restart. Sometimes, temporary glitches or incomplete installations can cause DLL errors. A quick reboot might resolve the issue.

2. Reinstall the Microsoft Visual C++ 2010 Redistributable Package

The most common fix involves reinstalling the package that contains the "msvcp100.dll" file. Follow these steps:

• Visit the official Microsoft download page for the Microsoft Visual C++ 2010 Redistributable Package.
• Download the appropriate version for your system:
  • x86 (32-bit): for 32-bit systems or applications.
  • x64 (64-bit): for 64-bit systems.
• Run the installer and follow on-screen instructions to complete the installation.
• Reboot your computer after installation completes.

This process replaces the missing or corrupted DLL file, often resolving the error.

3. Manually Download and Replace the DLL File

If reinstalling the redistributable package doesn’t work, you can try manually replacing the DLL file. However, this method requires caution to avoid security risks:

• Download the "msvcp100.dll" file from a reputable source or a trusted DLL repository. Be cautious to avoid malware.
• Copy the downloaded DLL file into the application's directory that generates the error. Usually, this is in the folder where the program is installed.
• If that doesn’t work, copy the DLL to the Windows System folder:
  • For 32-bit systems: C:\Windows\System32
  • For 64-bit systems: C:\Windows\SysWOW64
• Register the DLL file by opening Command Prompt as Administrator and running:
  regsvr32 msvcp100.dll
• Restart your computer and check if the error persists.

Note: Manually downloading DLL files from unofficial sources can pose security risks. Always prefer official or trusted sources when possible.

4. Run System File Checker (SFC) Scan

Corrupted system files can cause DLL errors. Running an SFC scan can repair missing or corrupted system files:

• Open Command Prompt as Administrator.
• Type the following command and press Enter:

sfc /scannow

Allow the scan to complete. If it finds issues, it will attempt to fix them automatically.

Reboot your computer and verify if the error is resolved.

5. Update Windows

Keeping your Windows OS updated ensures you have the latest system files and security patches:

• Go to Settings > Update & Security > Windows Update.
• Click "Check for updates" and install any available updates.
• Restart your computer and check if the DLL error persists.

6. Perform a Clean Boot

Conflicting software might cause DLL errors. Performing a clean boot helps identify if background programs are the culprit:

• Press Windows + R, type msconfig, and press Enter.
• In the System Configuration window, go to the Services tab, check "Hide all Microsoft services," then click "Disable all."
• Navigate to the Startup tab and click "Open Task Manager."
• Disable all startup items.
• Close Task Manager and click OK in the System Configuration window.
• Restart your computer and see if the error persists. If not, enable services one by one to identify the problematic program.

7. Reinstall the Affected Program

If the error appears only when launching a specific application, try uninstalling and reinstalling that program. Sometimes, the program’s installation becomes corrupted, causing missing DLL errors.

8. Use System Restore

If the problem started recently, restoring your system to a previous point when everything worked fine can resolve the issue:

• Search for "System Restore" in the Start menu and select "Create a restore point."
• Click "System Restore" and follow the prompts to choose a restore point.
• Complete the process and restart your computer.

Summary: Key Points to Fix "msvcp100.dll Was Not Found"

In summary, resolving the "msvcp100.dll was not found" error involves a combination of straightforward steps:

• Restart your computer to clear temporary glitches.
• Reinstall the Microsoft Visual C++ 2010 Redistributable Package, ensuring you select the correct architecture version.
• Manually replace or register the DLL file cautiously from trusted sources.
• Run system scans like SFC to repair corrupted system files.
• Keep your Windows updated to prevent missing files.
• Perform a clean boot to diagnose software conflicts.
• Reinstall the problematic application or use System Restore if necessary.

By following these steps, you can typically fix the "msvcp100.dll was not found" error and restore proper functionality to your programs. Remember to always back up your system before making significant changes, and rely on official sources for software and system files to maintain safety and security.