.NET Core 3.1 has been refreshed with the latest update as of November 08, 2021. This update contains reliability and other non-security fixes. See the release notes for details on updated packages.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

Go to Start > Settings > Update & Security > Windows Security > Device security . Under Security processor, select Security processor details. Select Security processor troubleshooting, and then under Clear TPM, select Clear TPM. You'll need to restart your device to complete the process.

To get the latest major update of Windows 11, see Get the latest Windows update. Check for Windows updates. Learn how to get the latest Windows updates to keep your device running smoothly and securely.

Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.

You can use installation media (a USB flash drive or DVD) to install a new copy of Windows, perform a clean installation, or reinstall Windows. To create installation media, go to the software download website, where you'll find step-by-step instructions.

Download the installer for all versions of Windows except 64-bit versions of Windows Server 2003 or 64-bit versions of Windows XP. The following file is available for download from the Microsoft Update Catalog: Download the Windows Installer 3.1 Redistributable (v2) package now. Release Date: May 12, 2005.

.NET Core 3.1 has been refreshed with the latest update as of April 12, 2022. This update contains reliability and other non-security fixes. See the release notes for details on updated packages.

April 9, 2024. Version: .NET Framework 3.5 and 4.8. The April 9, 2024 update for Windows 10, version 1809 and Windows Server 2019 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines.

In the September 20, 2022 preview update, we will disable TLS 1.0 and 1.1 by default for applications based on winhttp and wininet. This is part of an ongoing effort. This article will help you to re-enable them. These changes will be reflected after installing Windows updates released on or after September 20, 2022.