Microsoft to force install Microsoft 365 companion apps in October
Later this month, Microsoft will start automatically installing the Microsoft 365 companion apps on Windows 11 devices that have the Microsoft 365 desktop client apps. [...]
Windows 11 is Microsoft's desktop operating system, whose updates, security controls, and flaws affect the protection of PCs and their data.
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Background for this topic.
Windows 11 is Microsoft’s desktop operating system for personal computers and organizational endpoints. Its security model can use hardware-backed protections such as TPM 2.0 and Secure Boot, while virtualization-based security (VBS), credential isolation, Microsoft Defender, and Windows Hello help protect the boot process, credentials, and user sessions. These controls depend on compatible hardware, enabled policies, and correctly configured drivers and applications; they are not automatic protection against every attack.
For security teams, Windows 11 is a major vulnerability-management and endpoint-monitoring scope. Monthly updates address flaws that may enable privilege escalation, remote code execution, or security-control bypass, while third-party software, kernel drivers, and misconfigured services add attack surface. Organizations should maintain supported builds, test and deploy patches, verify Secure Boot and VBS posture, protect recovery and administrator credentials, and retain telemetry useful for detecting persistence or lateral movement. Hardware and configuration differences also matter when assessing exposure and forensic evidence.
Later this month, Microsoft will start automatically installing the Microsoft 365 companion apps on Windows 11 devices that have the Microsoft 365 desktop client apps. [...]
After rolling out Windows 11 25H2, also known as Windows 11 2025 Update, Microsoft has confirmed that the Media Creation Tool has stopped working on devices with Arm64 CPUs. [...]
Today, Microsoft announced the release of Windows 11 25H2, also known as Windows 11 2025 Update. [...]
Microsoft has released the KB5065789 preview cumulative update for Windows 11 24H2, which includes 41 improvements, including new AI actions in File Explorer and bug fixes for Windows Update and Windows Sandbox. [...]