If Windows Security (Microsoft Defender) throws Error 8024402f, Protection definition update failed on Windows 11, then follow this post to successfully fix the issue.

Microsoft has fixed CertificateServicesClient issue that was causing error events to appear in the Windows Event Viewer after ...

If you are not able to open Windows Security & you see error: Cannot Open this app, Your IT administrator has disabled Windows Security, see this post.

Microsoft has resolved a known issue causing false CertificateServicesClient (CertEnroll) error messages after installing the July 2025 preview and subsequent Windows 11 24H2 updates.

Can't install Windows 11 KB5062553 update? Worry not, follow these proven fixes to solve the error and related issues.

It’s been over two weeks since Microsoft released update KB5058405 for Windows 11 23H2, which was supposed to fix several security problems in the operating system. That urgency is why the ...

Microsoft has patched an Event Viewer bug impacting Windows 11, version 24H2 customers. However, the fix will be rolled out ...

Users repeatedly report that "Windows Security" no longer starts. As this virus protection is integrated, this error should be rectified immediately.

On Windows 11 (and 10), if the Windows Security app isn't working, you can reset it in multiple ways to resolve the most common issues, and in this guide, I'll explain how.

Microsoft warns that the August security update can prevent Windows 10 and 11 PCs from initiating a factory reset or recovery ...