Available on Windows

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Used by 7670 people for 668 hours, 34 minutes and 40 seconds

Windows Defender is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. GIANT AntiSpyware was a spyware detection and removal application developed by GIANT Company Software, Inc. and acquired by Microsoft Corporation in 2004. GIANT AntiSpyware was … More Edit

Popularity over the last 30 days (?)

vs.

RANK:

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  • Unionhawk devotee
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    Scans may be long, but they can run efficiently in the background (unlike Sophos, which must have a window open to scan) It takes up very little memory, and I have only ever had one problem with it, stated below

  • Unionhawk devotee

    Mine is refusing to run due to failed updates due to a faulty registry key that I can't delete... (lack of admin FTL)

  • Max Palumbo expert
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    I tried this on XP and it's OK but performance seems to be even better on Vista. You don't even realize that it's running.

  • rg_gapa devotee
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    I feel much safe if I have a lot of anti-malware applications, but it's really interesting - once a month I scan my computer with all programs which I have installed, but Windows Defender (only this app!) never found any spyware or something (hmmm). I don't know: I always have the newest virus database, but even if I scan system with defender first (before Ad-Aware and AviraAntivir) it didn't found anything. Scans are very long and In my opinion it's unnecessary program.

  • limur devotee

    Hideous.

  • Cramer devotee
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    Doesn't do much, but does its job.

  • weedmonk devotee
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    Don't even notice it. It complements my AV's antispyware with no drain on performance.

  • matzembacher devotee

    Very Good

  • Samuel devotee

    Works fine on my vista pc

  • Ejrech expert
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    Hmm. Well, the icon's nice, anyway.

    Somewhat difficult to rate it's performance, as I've never needed it. Seems to run fine, though.

  • ohnoanotherputz expert
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    had some problems with adware so I started running this, though I was pretty sure it wouldn't do much of anything. While it was running I did some research, and decided to try malwarebytes. I downloaded that program, and started running it along with defender, and not only did defender not find any infected files while malwarebytes found many, but it took twice as long to scan!

    It's not totally useless, I've had it catch things before, but there are better choices out there.

  • Jared Gray expert
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    It just works aslong as you dont load a shizload of crappy AV suites onto your computer.

  • yellowchilli expert

    is it me or does this just sit there and do nothing other than updateupdateupdate

  • Dinh Pham expert
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    Sometimes annoying but I love notifications for whatever happens underground, I feel good when I can have my own confirmations :)

  • Radek Holý expert
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    Yes, I haven't noticed any action (only updates).

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