4. Repair the Windows services: If this doesn’t work either, check the Windows system files. Enter cmd in the Windows search and select Command Prompt > Open as administrator.

If your Windows Security or Defender closes immediately after opening - or crashes on your Windows 11/10 computer, follow these steps to fix the issue ...

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.

If you are using Windows and Internet Explorer, the browser generates this error when it attempts to open a website that has a problematic security certificate.

Next, check for any pending Windows updates. Outdated Windows, especially if you have opted for the Windows Insider Program, can lead to errors like Kernel Security Check Failure.

Sometimes, Windows' Start Menu can get a little finnicky, even if you've never had an issue before. Luckily, there's plenty of things you can do to fix it.

Check if Microsoft Windows Defender does not start on Windows 10 issue still occurs. Method 9: Reset PC This is considered to be the last resort when the above mentioned fails to fix the issue.

The latest Windows software update is causing Blue Screen of Death for some users, but the update is hard to avoid.