Users encounter MSVCR120 DLL errors when Windows programs cannot locate this essential runtime library, often leading to frustrating crashes or failure to launch. These issues stem from missing files, corruption, or version conflicts within the Visual C++ 2013 Redistributable package. This guide examines the most frequent missteps people take while attempting repairs, helping you avoid pitfalls that worsen the problem.
“Understanding common mistakes in fixing MSVCR120 DLL errors saves time and prevents unnecessary system complications.”
Many attempt quick fixes without grasping the underlying causes, resulting in temporary solutions or new issues. By recognizing these errors early, you can apply proven methods that restore functionality reliably. This comprehensive exploration covers every major blunder and provides clear alternatives for effective resolution.
Misunderstanding the Nature of MSVCR120 DLL Errors
People often assume a single missing file causes all program failures, ignoring the broader runtime environment. The MSVCR120 DLL belongs to a specific version of Microsoft Visual C++ libraries that applications depend on for core functions. Treating it as an isolated file leads to incomplete repairs that fail under different conditions.
Error messages vary based on the triggering application and system state. Some display “The program can’t start because MSVCR120.dll is missing from your computer” while others mention side by side configuration problems. Misinterpreting these messages prompts inappropriate actions that address symptoms rather than root causes.
Users frequently confuse MSVCR120 DLL with other runtime files like MSVCR100 or MSVCR140. Each version supports different development tools and cannot substitute for another. This confusion results in installing wrong packages that create additional conflicts.
Ignoring System Architecture Differences
Attempting to fix 64 bit program errors with 32 bit libraries represents a fundamental mistake. Windows maintains separate folders for each architecture to prevent compatibility issues. Installing only one variant leaves half the applications vulnerable to the same error.
Many download files without verifying whether their system runs 32 bit or 64 bit Windows. This oversight causes persistent errors even after seemingly successful installations. Proper diagnosis requires checking system properties before any repair attempts.
Overlooking Multiple Instance Requirements
Some believe installing the redistributable once covers all future needs permanently. Applications built with different compiler settings may require specific configurations of MSVCR120 DLL. Removing or replacing existing installations can break previously working programs.
Downloading Files from Untrusted Sources
One of the gravest errors involves obtaining MSVCR120 DLL from random websites offering single file downloads. These sources often distribute modified versions containing malware or viruses. Legitimate files come only through official Microsoft redistributable packages.
Users searching for quick solutions fall prey to sites promising instant fixes with one click downloads. These files may work temporarily but introduce security risks that compromise the entire system. The false sense of resolution masks deeper problems until damage occurs.
“Never download individual DLL files; always use official Microsoft redistributable packages to fix MSVCR120 DLL errors safely.”
Third party repositories sometimes bundle the file with adware or cryptocurrency miners. Installation appears successful until background processes consume resources and trigger antivirus alerts. Recovery from such infections requires more effort than the original error repair.
Consequences of Using Modified Files
Altered DLL files can cause unpredictable program behavior beyond the initial error. Functions may execute incorrectly, leading to data corruption in saved files. Applications relying on precise calculations produce wrong results without obvious warnings.
Security software flags these files as threats during routine scans. False positives create confusion about whether the repair succeeded. Users waste time troubleshooting antivirus conflicts instead of addressing the real issue.
Identifying Legitimate Sources
Official Microsoft downloads include digital signatures that verify authenticity. Windows checks these signatures during installation to prevent tampering. Third party files lack this verification, making them immediately suspect.
Package names follow specific patterns like vcredist_x64.exe for 64 bit systems. Variations in naming or file size indicate potential problems. Comparing download details against Microsoft documentation ensures safety.
Incorrect Installation Procedures
Running redistributable installers without administrator privileges prevents proper system registration. Windows requires elevated permissions to place files in protected directories and update registry entries. The process completes without errors but leaves the system unchanged.
Many close the installer prematurely when progress appears slow. Installation involves multiple components that extract and register sequentially. Interrupting this sequence results in partial deployment that fails during program launch.
Users often install only the x64 version on 64 bit systems, forgetting 32 bit application support. Modern Windows runs both architectures simultaneously through WOW64 emulation. Complete coverage demands both redistributable variants.
Failing to Restart After Installation
Omitting system restart after installing Visual C++ redistributables leaves old library versions in memory. Running programs continue using cached copies until reboot clears the memory space. Errors persist despite successful installation completion.
Background processes hold DLL files in use, preventing replacement during installation. Restart ensures clean loading of new library versions for all applications. This simple step resolves many apparently failed repairs.
Running Multiple Installers Simultaneously
Starting both x86 and x64 installers at once creates file access conflicts. Windows locks files during installation to maintain integrity. Competing processes cause one or both to fail with cryptic error messages.
Sequential installation allows each package to complete fully before the next begins. This methodical approach prevents registry corruption and file version mismatches. Patience during this process ensures reliable results.
Using Registry Cleaners and System Optimizers
Aggressive registry cleaners remove entries related to Visual C++ runtime components mistakenly. These tools flag redistributable registrations as unnecessary to free space. The action breaks application launch sequences that depend on proper registry configuration.
System optimizers sometimes delete DLL files from temporary locations during cleanup operations. Files cached for repair or update processes disappear unexpectedly. Programs fail with missing file errors after seemingly routine maintenance.
“Avoid automated cleanup tools when troubleshooting MSVCR120 DLL errors to prevent creating new problems.”
Performance tweaks that disable Windows services can interfere with library loading. Application compatibility assistants and side by side management require specific services. Disabling them for speed gains causes runtime failures.
Understanding Registry Dependencies
Visual C++ redistributables create detailed registry keys during installation. These entries track version information and file locations for the operating system. Manual deletion requires precise knowledge to avoid collateral damage.
Windows uses registry data to resolve version conflicts between applications. Removing keys forces programs to use incorrect library versions. The resulting errors appear random and difficult to trace.
Safe Maintenance Alternatives
Windows built in Disk Cleanup removes temporary files without touching system components. This tool operates within Microsoft defined safety parameters. Regular use maintains performance without risking runtime libraries.
Manual verification through Programs and Features confirms redistributable presence. The interface displays version numbers and installation dates clearly. This method provides accurate status without third party intervention.
Manual File Replacement Attempts
Copying MSVCR120 DLL directly into application folders seems like a direct solution but creates version conflicts. Windows loads the local copy before system versions, potentially using incompatible code. Applications expecting specific function implementations crash unexpectedly.
Placing files in wrong system directories prevents proper registration with the operating system. System32 requires 64 bit files while SysWOW64 handles 32 bit versions. Misplacement causes programs to ignore the files completely.
Users sometimes replace files while programs run, triggering access denied errors. Windows locks loaded libraries to prevent corruption during execution. Forced replacement requires process termination and risks system instability.
Proper File Placement Protocol
Official installers determine correct locations based on system architecture automatically. Manual placement bypasses version checking and registration processes. The system cannot track multiple copies in different locations effectively.
Digital signature verification fails when files move from original installation paths. Security software flags relocated system files as potential threats. Users face additional warnings that complicate troubleshooting.
Version Conflict Scenarios
Applications compiled with different Visual Studio 2013 updates expect specific function exports. Manual replacement with mismatched versions causes immediate crashes. Error messages reference procedure entry points that cannot be located.
Side by side configuration errors increase with multiple file versions present. Windows attempts to load the manifest specified version but finds conflicts. The resolution process fails, preventing program startup.
Ignoring Windows Update Requirements
Disabling Windows Update prevents delivery of critical runtime library patches. Microsoft releases security fixes and compatibility improvements through this channel. Systems missing updates encounter errors resolved in newer redistributable versions.
Cumulative updates often include updated MSVCR120 DLL files for stability improvements. Skipping these updates leaves known bugs unaddressed. Programs fail with errors that patches would prevent.
Users on metered connections defer updates indefinitely to save bandwidth. This practice accumulates technical debt that manifests as runtime errors. Periodic update sessions maintain system health effectively.
Update Verification Process
Windows Update history displays installed package details with dates and KB numbers. Searching for Visual C++ related entries confirms patch application. Missing entries indicate potential update problems requiring attention.
| Security Only | KB300XXXX to KB310XXXX | Critical vulnerability patches |
| Monthly Rollup | KB401XXXX to KB410XXXX | Stability and compatibility fixes |
| Feature Update | Version specific | Major runtime improvements |
Manual Update Strategies
Downloading standalone update packages applies specific fixes without full Windows Update. Microsoft Update Catalog provides these files for offline installation. This method works well for systems with limited internet access.
Scheduled update windows minimize disruption to regular computer use. Automatic maintenance performs installations during idle periods. The approach balances security needs with productivity requirements.
Attempting Repairs on Running Systems
Performing file operations while Windows loads MSVCR120 DLL into memory fails consistently. Active processes lock the file, preventing replacement or deletion. Error messages about files in use halt repair attempts prematurely.
Safe Mode startup allows system file operations without interference from third party software. This environment loads minimal drivers and services for maintenance tasks. File replacement succeeds where normal mode fails.
Users restart into normal mode immediately after file operations without verification. Pending operations complete during shutdown that require reboot to finalize. Changes appear missing until the next restart cycle.
Safe Mode Access Methods
F8 key during boot provides legacy access to Safe Mode on older Windows versions. Modern systems require Shift Restart from the login screen. The Advanced Startup menu offers multiple diagnostic options.
Command line boot configuration enables Safe Mode through bcdedit commands. This method supports automated maintenance scripts for enterprise environments. Technical users prefer this approach for consistency.
Verification After Maintenance
System File Checker runs in Safe Mode to validate protected file integrity. The sfc scannow command compares current files against known good versions. Discrepancies trigger automatic repair from the Windows cache.
Dependency analysis tools confirm library loading after maintenance completion. Process Explorer displays detailed DLL information for running applications. This verification ensures repairs took effect properly.
Overlooking Backup Precautions
Deleting registry entries without export creates irreversible damage to application configurations. Windows stores critical path information in these locations for runtime resolution. Accidental removal requires complete redistributable reinstallation.
System image backups capture complete runtime environments before repair attempts. Restoration returns the system to a known working state if problems arise. This safety net encourages thorough troubleshooting without fear of permanent damage.
Users modify system files directly without creating restore points. Windows uses these snapshots for rollback when updates fail. The absence forces manual recovery through reinstallation procedures.
Backup Strategy Components
- System Restore Points: Capture registry and system file states automatically before changes.
- File History: Maintains versions of user documents during system modifications.
- Disk Images: Complete sector by sector copies for full system recovery.
Recovery Planning
Testing backup restoration validates the process before emergencies occur. Regular verification prevents surprises during actual recovery scenarios. Documented procedures ensure consistency across different machines.
Disaster recovery drills identify gaps in backup coverage periodically. Application compatibility testing after restoration confirms functionality. This proactive approach minimizes downtime during real incidents.
Misusing Command Line Tools
Running sfc scannow without understanding its scope leads to incomplete repairs. The tool checks protected system files but cannot fix missing redistributables. Users expect complete resolution from this single command.
DISM commands require specific parameters for image repair operations. Generic usage fails to address component store corruption effectively. Proper syntax targets Visual C++ components directly for restoration.
Elevated command prompts execute system commands with necessary privileges. Standard user tokens lack permission for file operations in protected directories. Access denied errors result from this common oversight.
Command Sequence Examples
First, verify component store health with DISM /Online /Cleanup Image /CheckHealth. Then, scan for issues using DISM /Online /Cleanup Image /ScanHealth. Finally, repair corruption through DISM /Online /Cleanup Image /RestoreHealth.
Log Analysis Techniques
Command output contains detailed error codes for troubleshooting. Event Viewer correlates these codes with system events chronologically. The combined information pinpoints exact failure points during repair.
Conclusion
Avoiding common mistakes when fixing MSVCR120 DLL errors transforms frustrating experiences into straightforward maintenance tasks. The most critical errors involve downloading files from untrusted sources, misunderstanding system requirements, and using improper tools without preparation. Each misstep compounds problems that simple, official methods would resolve quickly and safely.
Key takeaways center on using Microsoft official redistributable packages exclusively, installing both architecture versions, and restarting after completion. Never replace individual files manually or use registry cleaners that target runtime components. Always create backups and use Safe Mode for file operations when normal mode fails.
Mastering these principles ensures reliable program operation across Windows systems. The knowledge applies to other runtime libraries with similar characteristics. Implementing proper procedures now prevents future complications and maintains system integrity for years of smooth computing.