When you enable the ASR rule “Block Win32 API calls from Office macros” in Microsoft Defender for Endpoint, you may find that legitimate Office add-ins stop working or fail to load. This happens because many add-ins rely on Win32 API calls through macros to perform routine tasks such as accessing files, interacting with the operating … Read more
You have added file, folder, or process exclusions to Microsoft Defender Antivirus on Windows 11, but after you restart the computer, the list is empty. This problem occurs when a Group Policy setting, a corrupted policy cache, or a third-party security tool overwrites the exclusion configuration during boot. This article explains the root causes and … Read more
When Memory Integrity also known as Hypervisor-protected Code Integrity or HVCI is enabled on Windows 11, it blocks drivers that do not meet the Windows Hardware Compatibility Program or WHCP signing requirements. This can cause devices like printers, graphics cards, or storage controllers to stop working. The blocked driver is recorded in the system event … Read more
You have a PC that supports Hyper-V, but Credential Guard fails to enable through Windows Defender Device Guard or Group Policy. The Enable-CredentialGuard PowerShell cmdlet returns errors, or the feature remains listed as Not Enabled in System Information. This is not a hardware problem in most cases. The root cause is often a conflict between … Read more
Tamper Protection in Microsoft Defender Antivirus is a security feature that prevents unauthorized changes to your device’s security settings. On Windows 11, local administrators sometimes find the Tamper Protection toggle greyed out in the Windows Security app. This occurs when a higher authority, such as a Group Policy or an MDM policy, locks the setting. … Read more
You have an installer file from an unknown source. You want to test it without risking your main Windows 11 system. Windows Sandbox provides an isolated, temporary desktop environment for exactly this purpose. When you close the Sandbox, everything inside is permanently deleted. This article explains how to configure and use Windows Sandbox to run … Read more
You configure App and Browser Control in Windows Security to the Off or Warn setting, then after installing a cumulative update, the setting reverts to On. This forces SmartScreen to block unrecognized apps and files again, which can interrupt your workflow. The cause is a deliberate behavior in Windows 11 that Microsoft uses to restore … Read more
You open Settings > Accounts > Sign-in options and look for the Picture Password section. It is not there. The toggle to create or remove a picture password has vanished. This problem prevents you from using an image-based sign-in method on your Windows 11 device. The missing toggle is caused by a disabled Windows Hello … Read more
You want to control how long a child or other family member uses a Windows 11 device, but the person you are managing has a local account, not a Microsoft account. Windows 11 Family Safety normally requires each family member to sign in with a Microsoft account to apply screen time limits. This article shows … Read more
You open Event Viewer on Windows 11 and find the Security log filled with thousands of sign-in events every hour. This flood makes it nearly impossible to find a specific login failure or suspicious entry. The cause is an overly broad sign-in audit policy that logs every authentication attempt, including background service logins and network … Read more