In this article Summary Take Action altSecID attributes Timeline of changes Registry Settings Audit Events Event ID: 45 Event ID: 21 Known issue Summary The Windows security updates released on or after April 8, 2025, contain protections for a vulnerability with Kerberos authentication. This update provides a change in behavior when the issuing authority of the certificate used for a security ...

Learn how to fix error 0x80073D21 so you can install and play an Xbox Game Pass game on a Windows 10 device.

Provides links to the uninstall tools and directions for many security programs.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

The App & Browser Control page in the Windows Security app provides essential security settings that protect your Windows device from unsafe apps, files, websites, and downloads. By combining reputation‑based protection with exploit mitigation, it helps prevent malware, phishing attempts, and other security threats from compromising your system. The page is divided into the following ...

Learn how to turn on Control flow guard so you can install and run Windows Subsystem for Android.

Summary The /INTEGRITYCHECK linker option provides Windows kernel digital signature verification for user mode Portable Executables (PE) files. This linker option is required for anti-malware and anti-cheat scenarios to register components with the Windows Security Center. You must sign IntegrityCheck-linked user mode PEs using Trusted Signing (formerly Azure Code Signing). The cross-signing ...

In this article Summary Discovering Explicitly Set Session Key Encryption Types Registry Key settings Windows events related to CVE-2022-37966 Frequently Asked Questions (FAQs) and Known Issues Glossary Summary The Windows updates released on or after November 8, 2022 address security bypass and elevation of privilege vulnerability with Authentication Negotiation by using weak RC4-HMAC ...

Provides Windows client guidance for IT Pros to protect against speculative execution side-channel vulnerabilities.

Describes an update that adds TLS 1.1 and TLS 1.2 to default security protocols in Windows Server 2012, Windows 7 SP1, and Windows Server 2008 R2 SP1.