An update for Windows Defender on Windows Vista has been released. The update corrects a problem in the functionality of Windows Defender malware sample submission. This update applies only to Windows Defender version 1.1.1505.0 on Windows Vista. This problem does not occur in Windows Defender version 1.1.1593.0 on Microsoft Windows XP. This problem also does not occur in later versions of Windows Defender on Windows XP.

Note: This update to Windows Defender on Windows Vista does not change the version information of the Windows Defender files.

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Lifehacker points out how to turn off Defender, if for some strange reason you wanted to do so. Keep reading →

The ninth tip video by PCWizKid. Is your Windows Vista plagued with unwanted startup applications remove them easily with Windows Defender.

You may experience issues enabling Windows Defender application in Windows Vista. This article explains you the troubleshooting procedure to resolve the same.

When you try to update Microsoft Windows Defender on a Windows Vista-based computer, you receive an error message that resembles the following:

Error found: Code 0×80240029

When you try to start Windows Defender after you upgrade from Microsoft Windows XP to Windows Vista, you receive the following error message:

Application failed to initialize.

When you start a Windows Vista-based computer, you receive the following Windows Defender warning message in the notification area at the far right of the taskbar:

Windows has blocked some startup programs.

Windows blocks programs that require permission to run when Windows starts. Click to view blocked programs.
Note: You can see a list of blocked programs and services by following these steps:

1. Click the Blocked startup programs icon that is in the notification area.
2. Point to the Run blocked program menu list. The programs and services that have been blocked from starting are located here.