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msvcr71.dll is missing on Windows 7 and I can't register my dll throw regsvr32

I just can't understand why it can happen Does this dll come with OS, or I can install C++ runtime libraries, or .NET framework to present this file in Windows?

The question is: what (C++ runtime/NET framewor/...) have I to download to present this file in Windows 7?

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up vote 6 down vote accepted

msvcr71.dll is Microsoft Visual C++ Runtime Library for Visual C++ .NET 2003. It comes as part of .NET Framework 1.1.

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