
Fix 'Windows Security App Not Installed' on Windows 10
You open the Start menu, search for Windows Security, and nothing shows up. Or you see a message ...

You open the Start menu, search for Windows Security, and nothing shows up. Or you see a message ...

You open Event Viewer, navigate to Windows Logs > Security, and see nothing recent—or nothing at ...

You tap Install in Microsoft Store, but the download stays stuck on "Pending" and never starts. T...

You open Chrome, and instead of your usual startup page, you get an error message saying somethin...

If Windows Defender crashes on startup with error code 0x80073b01, the antivirus service may be f...

When you see a "token expired" message during login in Chrome, it usually means the authenticatio...