The Microsoft Excel 120 Object Library DLL is used to provide a programmatic interface to Excel, allowing developers to create custom applications that can interact with Excel. This library is used by developers to:
One famous example: fake “Excel12.0.dll repacks” were found to contain , designed to steal browser passwords and cryptocurrency wallets.
When searching for "free download repacks" of DLLs or Object Libraries, caution is mandatory.
Solution 4: Install the Primary Interop Assemblies (PIA) for Developers