In simple terms, this redistributable package allows applications written in C++ using Microsoft Visual Studio 2008 with Service Pack 1 to run on a computer that does not have Visual Studio installed. Without it, many programs will fail to launch, displaying errors like "The application has failed to start because its side-by-side configuration is incorrect" or "MSVCR90.dll is missing."
| File Name | Description | Typical Location (x64) | | :--- | :--- | :--- | | msvcr90.dll | C Runtime Library | C:\Windows\System32 | | msvcp90.dll | C++ Standard Library | C:\Windows\System32 | | mfc90.dll | Microsoft Foundation Classes | C:\Windows\System32 | | mfcm90.dll | MFC Managed Code Support | C:\Windows\System32 | | atl90.dll | Active Template Library | C:\Windows\System32 | | VCOMP90.DLL | OpenMP Parallel Library | C:\Windows\System32 | The file version should start with 9
Get-WmiObject -Class Win32_Product | Where-Object $_.Name -like "*Visual C++ 2008*" While you can uninstall the Microsoft Visual C++ 2008 SP1 Redistributable Package (x64) via Programs and Features , doing so is strongly discouraged unless you know exactly which applications depend on it. In simple terms
vcredist_x64.exe /quiet /norestart To get a return code (0 for success, 1638 for already installed, 3010 for reboot required): many programs will fail to launch
C:\Windows\System32\msvcr90.dll Right-click → Properties → Details tab. The file version should start with 9.0.30729.xxxx . Run: