Sydney Tech Guy

Or Do I still need Windows Defender?

Windows Defender protects your computer against spyware, pop-ups and slow performance.

Microsoft Security Essentials protects your PC from viruses, spyware, and other malicious software.

Windows Defender is built into Windows Vista and Windows 7 and it’s available as a free download for Windows XP.

Windows Defender is already installed in Windows Vista or Windows 7 and you install Microsoft Security Essentials, the installation will disable Windows Defender.

On Windows XP, if you have Windows Defender installed and want to install Microsoft Security Essentials, you will see a warning to uninstall Windows Defender.

So the sort answer is no, you don’t need Windows Defender anymore if you have Microsoft Security Essentials installed, and its something I would highly recommend doing as at the very least its a free fully functional anti-virus application.