Taming Windows Defender - How To Allow Unrecognized Apps On My PC  

  1. Posts : 64
    Windows 7 Professional --> Windows 10

    Taming Windows Defender - How To Allow Unrecognized Apps On My PC

    For many years, I have used Rainlendar-Lite as a desktop calendar app with Windows. Recently they advised me of a new version being available, so I downloaded the installer and tried to run it, first the normal way and then with Administrator privileges. In every case, Windows Defender blocks the executable because it doesn't recognize the publisher.

    I scanned the install program with Webroot SecureAnywhere v 9.0 and it found no problem. I noticed that Windows Defender is using Public Network settings on my computer, which is NOT connected to a public network, but the settings look exactly the same.

    Previously, Windows gave me the option to take responsibility for running unrecognized apps on my system, but apparently that option has been taken away. What is the best way to regain control over my system?

    Windows Version 1909 Build 18363.592
      My Computer

  2. Posts : 56,676
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider

    I was helping with one yesterday which is very similar. All of a sudden, Defender is balking at ununsigned installler/apps.

    Take a look here, follow the member's link to Reddit. Shows a Reg fix for it. He said it fix his issue. Might well be the same thing.

    Cannot install known safe programme...
      My Computers

  3. Posts : 64
    Windows 7 Professional --> Windows 10
    Thread Starter


    I finally got some help from a MS technical support assistant. Apparently my system had a spasm and turned "on" some security settings that were causing my problem. Here's what worked for me:

    1. Start the Windows Security app
    2. Choose App & Browser Control on the left panel
    3. Set radio buttons to "Warn" if it says "Block"

    That should give you the option to install trusted software that's not on the MS list of approved apps. I often scan stuff before installing anyhow.

    BTW, I'm an amateur at this so your results may differ.
    Attached Thumbnails Attached Thumbnails Taming Windows Defender - How To Allow Unrecognized Apps On My PC-security.jpg  
      My Computer

  4. Posts : 14,009
    Windows 11 Pro X64 22H2 22621.1848

    @jmrathbun, excellent, good instructions and worth keeping. Thanks
      My Computers


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