Smart App Control Frequently Asked Questions - Microsoft Support
If the app is believed to be malicious or potentially unwanted, then Smart App Control will block it. If the security service is unable to make a confident prediction about the app, then Smart App Control checks to see if the app has a valid signature.
Unity security vulnerability impacting some games | Xbox Support
Learn about the Unity Editor security vulnerability affecting some Microsoft games and apps on Android, Windows, Linux, and macOS.
Getting started with web protection in Microsoft Defender
It does this by checking links you click on, or that an app tries to open on your device and comparing them against our constantly updated list of sites known to be dangerous.
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Windows
Xbox Support
Check Xbox services, games, and apps for service outages or functionality issues.
September 9, 2025—KB5065426 (OS Build 26100.6584)
This fix reduces the scope for requiring UAC prompts for MSI repairs and enables IT admins to disable UAC prompts for specific apps by adding them to an allowlist.
Protect yourself from phishing - Microsoft Support
Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies, friends, or acquaintances in a fake message, which contains a link to a phishing ...
Get more help | Xbox Support
Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.
Phishing and suspicious behavior in Outlook - Microsoft Support
A phishing email is an email that appears legitimate but is actually an attempt to get your personal information or steal your money. Some deceptive emails appear to be from a safe sender but, in fact, have a "spoofed" source address to fool you. Here are some ways to deal with phishing and spoofing scams in Outlook.com. Spoof intelligence in Exchange Online Protection helps prevent phishing ...
Applies To:
Outlook 2024, Outlook 2024 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2016, Outlook on the web, Outlook.com, New Outlook for Windows
Turn on Control flow guard on your computer - Microsoft Support
Select App & browser control. Under Exploit protection, select Exploit protection settings. Under Control flow guard (CFG), expand the box and select Use default (On). Restart your computer. Related topics Windows Subsystem for Android Install mobile apps and the Amazon Appstore on Windows
How to manage the Windows Boot Manager revocations for Secure Boot ...
In a command window, copy the recovery app to the flash drive using the following commands (assuming the flash drive is the “D:” drive). Type each command separately and then press Enter: