MultiPack Visual C++ Installer for Windows isn[SQ]t a standard or widely known installer package name. There[SQ]s no official Microsoft product or common third-party tool with that exact name.

It[SQ]s highly likely that :

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It[SQ]s a custom-built installer:

Someone or a company created a proprietary installer application specifically for their software that uses the Visual C++ runtime libraries and named it something similar. The "MultiPack" part likely indicates it installs multiple components or versions of software.

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It[SQ]s a misremembered name:

The actual name might be slightly different. Try searching for variations or recalling any other details about the software it installs.

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It[SQ]s part of a larger package:

The name might be part of a larger installer[SQ]s description, rather than the installer[SQ]s actual name.

To figure out what it is, you[SQ]d need more context. Where did you encounter this name? What software was it associated with? Knowing this information would help identify the actual installer.