If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. Run the System File Checker tool (SFC.exe) To do this, follow these steps:

We recommend that you install update KB 2919355 on your Windows 8.1-based, Windows RT 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future. If you install a language pack after you install this update, you must reinstall this update.

In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. The security update addresses the vulnerability by correcting how .NET Framework checks the source markup of a file.

Update 4.0.3 for Microsoft .NET Framework 4 is now available. This update includes a set of new features and fixes some bugs, based on top customer requests and the .NET Framework scenarios. This update release updates only the runtime files for the Microsoft .NET Framework 4.

.NET Core 3.1 has been refreshed with the latest update as of July 13, 2021. This update contains reliability and other non-security fixes. See the release notes for details on updated packages.

.NET Core 3.1 has been refreshed with the latest update as of December 13, 2022. This update contains security and other non-security fixes. See the release notes for details on updated packages.

The Windows 10 Universal CRT is a Windows operating system component that enables CRT functionality on the Windows operating system. This update allows Windows desktop applications that depend on the Windows 10 Universal CRT release to run on earlier Windows operating systems.

Learn how to use Windows File Recovery app to restore or recover lost files that have been deleted and are not in the recycle bin.

Installing servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft security fixes. This update is available through Windows Update. It will be downloaded and installed automatically.

In order to install Update Rollup 4 for System Center 2012 Service Pack 1 Virtual Machine Manager, you have to uninstall Update Rollup 1 for System Center 2012 Service Pack 1 Virtual Machine Manager from your system.