The real KB958488 applies to , not Windows 6.1 (Windows 7). If someone told you this update is needed for Windows 7, they are mistaken. Always cross-check with Microsoft’s official documentation.

Are you getting a when you try to run the installer? KB4489885 - Microsoft Update Catalog

The primary repository for all historical enterprise patches is the Microsoft Update Catalog.

: Occasionally available via the legacy Download Center , though many older .NET 4.0 links now redirect to modern .NET versions (like 4.8). How to Install Once you have downloaded the file:

Review the generated list to locate the entry matching or Windows Server 2008 R2 for x64-based systems .

Legacy applications requiring .NET 3.5 might fail to install or run, requiring this KB package to update the framework.

Always download system updates directly from the Microsoft Update Catalog . Search: Enter "KB958488" into the catalog search bar.

: Designed for 64-bit (x64) systems running Windows 6.1 (the internal version number for Windows 7). Common Confusion

: The file extension stands for Microsoft Update Standalone Package . This format relies on the built-in Windows Update Standalone Installer ( wusa.exe ) to apply updates locally without requiring an active internet connection to the public Windows Update servers. The Role of KB958488

While this specific .msu file is often bundled within larger .NET Framework installers, you can typically find related updates through these official channels:

: When you run the installer, it extracts files to a random alphanumeric folder (e.g., C:\a971f2ca352388c1a904\ ). You can find the file inside that temporary directory. Microsoft Learn 2. How to Install (or Fix Installation Errors)

: This is the Knowledge Base identification number for the specific software patch.