This July 30, 2018, update for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 fixes an issue in .NET Framework 3.5 SP1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.
This update addresses an issue that was introduced in the July 2018 .NET Framework updates. Applications that rely on COM components were failing to load or run correctly because of “access denied,” “class not registered,” or “internal failure occurred for unknown reasons” errors. For more information about this issue, see the following article in the Microsoft Knowledge Base:
4345913 "Access Denied" errors and applications with COM activation fail after installing July 2018 Security and Quality Rollup updates for .NET Framework
How to get this update
For Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2
This update is available by manual download only.
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.
To apply this update, you must have .NET Framework 3.5 SP1 installed.
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.
The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.