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  • Do I Need Windows Defender in Windows 7?

    Home Forums AskWoody support Windows Windows 7 Questions: Windows 7 Do I Need Windows Defender in Windows 7?

    This topic contains 2 replies, has 3 voices, and was last updated by  Cybertooth 3 weeks, 4 days ago.

    • Author
    • #2007778 Reply


      I have an old machine running Windows 7 that uses Abelha Digital’s HostsMan ( to block virtually ALL web advertising — the major source of all malware infections, after email attachments.

      I’ve been using it for at least a decade, ever since Fred Langa recommended it in an issue of Windows Secrets, and it’s been just WONDERFUL.

      Meanwhile, I see that this machine is running Windows Defender as a service, and it is constantly using about 48% of the CPU.

      Since Windows Defender for Windows 7 is considered inadequate anyway, I’m inclined to turn it off.  Any comments?

      Thanks to all,
      — AWRon

    • #2007839 Reply

      Paul T
      AskWoody MVP

      This thread has some useful advice on migrating off Defender.

      How to switch AV from MSE to Bitdefender at EOL

      cheers, Paul

    • #2008042 Reply

      AskWoody Plus

      Windows Defender (the original “anti-malware” version, not the newer “anti-virus” version) had some utility in Vista, where it would alert you if a program was trying to modify the registry. But this feature was removed in Windows 7, and WD became little more than a second-rate scanner. (The program has since been renamed and current versions score highly  in AV detection tests.)

      You can uninstall Windows Defender from your Windows 7 computer with minimal impact on its security. And if it’s sucking up 48% of your CPU cycles, then your PC will actually be better off without WD.


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