Windows Defender will not allow installation

  1. Posts : 99
    Windows 10

    Windows Defender will not allow installation

    I have Ant Video Downloader for Firefox and it complained about needed to upgrade the Native Application, so I downloaded it, as I have before, and a window popped up and said Windows Defender Smartscreen blocked it. After spending half an hour finding a way to get gpedit.msc on my computer (Windows 10 Home) from a download, I changed the policy setting and turned off Windows Defender. However, even though the settings say that Windows Defender Antivirus is turned off, I still get a popup window when I try to install the Ant update. I also turned off the anti-malware protection, but still can't install the update.

    i have Windows 10 Home, version 1903, OS build 18362.720
    Any ideas or solutions for me?
      My Computer

  2. Macboatmaster's Avatar
    Posts : 868
    10, 8.1 and 7 all Professional versions, and Linux Mint

    You did not need GPEdit
    It can be done from Settings - Update and Security - windows security on left pane and then on main window as per my screenshot

    then open virus and threat protection
    Turn OFF
    App and browser Control
    Turn off

    See if it will install then
    Generally speaking for all except the more specialist changes Windows 10 provides more ability via settings than many previous OS - and GPEdit - Group Policy is not required as often as it was
      My Computer

  3. Posts : 99
    Windows 10
    Thread Starter

    I have Comodo Internet Suite on my computer so Defender shouldn't even be an issue. If I turn off virus protection completely, Comodo will go away as well.
      My Computer

  4. Macboatmaster's Avatar
    Posts : 868
    10, 8.1 and 7 all Professional versions, and Linux Mint

    You said it was defender smart screen
    If you click as indicated on my screenshot on app and browser control you will find smart screen - turn it off
    You are only turning them off while you install the Video downloader.
    Then you turn them back on.

    Assuming the Video app is from a reliable source that procedure will not be a problem
      My Computer

  5. Posts : 99
    Windows 10
    Thread Starter

    I misunderstood. Yes, that fixed it. Thank you!

    What I don't understand, though, is why Defender is still on at all.
      My Computer

  6. Macboatmaster's Avatar
    Posts : 868
    10, 8.1 and 7 all Professional versions, and Linux Mint

    It is not often understood that certain aspects of Defender in its new form on 10 from 1903 are NOT turned off when another AV is in use.
    If you want my opinion, Defender is the one to use, it is now very highly ranked by independent assessments and its overriding advantage on 10 is that is, 100% compatible with 10, 100% of the time.

    Most of the third party AV apps, although they start of, great, show problems, after some security updates and especially in my experience after version updates.

    Microsoft of course circulate to all the major AV providers details of the changes in the various updates for security and versions, before they are made available to the general users.

    However despite this, it is my experience that the majority of third party AV programs, tend to cause problems on 10.

    Without getting too technical, it is although in some respects, still like previous Windows, it has some unique features and Defender caters for these. I am unsure that some 3rd party AV programs do so as efficiently as Defender.

    If you wish to consider it, I can send you a full technical document on DEFENDER and its capabilities.

    Pleased to have helped you.
      My Computer

  7. Posts : 99
    Windows 10
    Thread Starter

    I had read a couple of reviews of Defender that said it was quite robust now, but didn't know whether to believe them. Defender does not provide a firewall, though, is that correct? Has the firewall also been improved, or should I keep using another? Microsoft, of course, says to leave it on, but I don't always trust their opinions about their own products.
      My Computer

  8. Jacee's Avatar
    Posts : 1,591
    Win 10 home 20H2 19042.928

    MS Defender does have a firewall.
      My Computers

  9. Ztruker's Avatar
    Posts : 13,512
    Windows 10 Pro X64 20H4 19042.746

    It's all there and it's very good.

    Windows Defender will not allow installation-image.png
      My Computers

  10. Macboatmaster's Avatar
    Posts : 868
    10, 8.1 and 7 all Professional versions, and Linux Mint

    As I said and my colleague Ztruker has provided some more detail for you
    IMHO Defender is the one to use
    I outlined in brief, the main reason why, and as I also said it has scored extremely well in independent testing
    As you have seen from the attempt to install the Video app, it adequately covers browser safety as well, In addition to the extra security offered by Edge.

    Here are some links for you to read further if you wish
    Microsoft Windows Defender Review | Trusted Reviews

    Why you can stop paying for antivirus software | PCWorld

    Although this one also deals with aspects of Defender on other than the normal home computer, it provides a good brief of how comprehensive it is.

    Then on this link
    you can see the details applicable to the Defender you have and all other non commercial systems have

    and on the 3rd image down, Windows Defender Security Centre you will see on the right there are four other links to click on , for further information.
      My Computer


  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 14:04.
Find Us

Windows 10 Forums