MCI32.ocx is a very important file inside Windows Vista which allows applications to use the Visual Basic 6.0 framework. Unfortunately, VB6.0 was outdated at the launch of Vista and common VB6.0 component files, including MSI32.ocx were left out of the installation of Vista. This means that if you’re now receiving errors from this file, it’s most likely down to the way in which Vista is not able to use them on your PC. Here’s how to fix the issue:

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