Windows 10: Can't Open Windows Defender

Discus and support Can't Open Windows Defender in Windows 10 Support to solve the problem; I ran into the first problem with my image I stripped down with MSMG, I can't get windows defender to launch but it's running as a service because it... Discussion in 'Windows 10 Support' started by Soapm, Mar 3, 2019.

  1. Soapm Win User

    Can't Open Windows Defender


    I ran into the first problem with my image I stripped down with MSMG, I can't get windows defender to launch but it's running as a service because it quarantined a file I was about to use. I just can open the app to release the file from quarantine.

    While in Windows Security, I clock on Virus and Threat protection and get a popup that says, "You'll need a new app to open this windowsdefender". Any suggestions how I can get around this error or reinstall windows defender without loading my machine back up with windows bloatware? Anyway to manually un-quarantine a file (where are they stored)?

    I did run sfc /scannow but that didn't fix it.

    ps... During the strip down I removed the store and all the metro apps. Didn't know any was needed for defender or that defender was left on the machine for that matter.

    :)
     
    Soapm, Mar 3, 2019
    #1
  2. Arul_D Win User

    Installing Apps on Windows 10 Has Windows Defender Finding Malware

    Hi Tommy,

    Welcome to the Microsoft Community.


    • Is this issue specific to third party apps?
    I would suggest you to open Windows defender and add exclusions and check if it helps. Follow the steps to add exclusions in windows Defender.


    • Type Windows defender settings in the search bar and press enter

    • Under Exclusions click on Add Exclusion
    Hope this information helps. Reply to the post with an updated status of the issue so that we can assist you further.
     
    Arul_D, Mar 3, 2019
    #2
  3. defender scans

    Hi Ian,

    Thanks for posting your query on Microsoft Community.

    This issue might occur if you have set any task scheduler for Windows Defender.

    I suggest you to delete the task for Windows defender and check if it helps.

    Follow the below steps:


    • Search and open Schedule tasks.

    • In the left-hand menu, open the Task Scheduler Library, then select
      Microsoft >Windows >Windows Defender.

    • Double-click Windows Defender Scheduled Scan.

    • Select the Triggers panel, then select Delete.

    Hope it helps, reply to us with the status of your issue. We will be happy to assist you.
     
    Santosh_Rai, Mar 3, 2019
    #3
  4. Ahhzz Win User

    Can't Open Windows Defender

    Windows 10 Tweaks

    Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

    Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

    • Open a new Explorer window.
    • Click View in the ribbon.
    • Click Options.
    • Under General, next to “Open File Explorer to:” choose “This PC.”
    • Click OK


    credit to Lifehacker.
     
    Ahhzz, Mar 3, 2019
    #4
Thema:

Can't Open Windows Defender

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