+The Microsoft Visual C++ Redistributable for x64 is required on Windows. Stability Matrix checks for it automatically during package installation and silently installs the required version as part of the normal prerequisite setup, so most users never need to do anything here. If a package still fails to start because the required Microsoft C/C++ runtime is missing (e.g., a missing c10.dll error when loading PyTorch), that's a sign the automatic install didn't complete successfully — as a fallback, install the latest [Visual C++ Redistributable x64 package](https://aka.ms/vc14/vc_redist.x64.exe) manually, or see Microsoft's [Visual C++ Redistributable downloads page](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170).
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