Windows 10: Unable to run full scan on Windows Defender

Discus and support Unable to run full scan on Windows Defender in AntiVirus, Firewalls and System Security to solve the problem; I am unable to run a full scan on Windows Defender - the scan runs extremely slowly (only a dozen files per minute) and often hangs. The issue isn't... Discussion in 'AntiVirus, Firewalls and System Security' started by Clueless, Aug 29, 2015.

  1. CLUELESS
    Clueless Win User

    Unable to run full scan on Windows Defender


    I am unable to run a full scan on Windows Defender - the scan runs extremely slowly (only a dozen files per minute) and often hangs. The issue isn't that I have too many files - I've used only half of my available space and full scan worked perfectly well before I upgraded to Windows 10. Quick scan functions normally. How can I solve this issue?

    :)
     
    Clueless, Aug 29, 2015
    #1
  2. TILLYFLOTZ
    TillyFlotz Win User

    Can't do Full Scan in Windows Defender since most recent Windows 10 update

    Why am I unable to run a FULL Scan in Windows Defender since the latest Windows 10 update? The scan has literally been running for 3 days and hasn't completed. I am able to do a Quick Scan, but that is all. Also, I'm unable to run an update check.

    [Moved from Windows]
     
    TillyFlotz, Aug 29, 2015
    #2
  3. LE BOULE
    Le Boule Win User
    unable to update windows defender & run a full scan without an error message

    That is usually (but not always) a transient error that is sometimes accompanied by error code 0x8007139F.

    Restart the computer and that should fix it though some users report a manual update of Windows Defender followed by a reboot may also be required.

    Alternatively - - -

    Some users report seeing this error if a third party antivirus program (or a remnant of a previous security program) is still installed. See Problems
    starting Windows Defender in Windows 8/8.1/10

    and be sure you run the appropriate software removal tools for any other antimalware program that may have been on the computer...you'll need to reboot the computer after doing so: List
    of anti-malware product removal tools



    Regards…
     
    Le Boule, Aug 29, 2015
    #3
  4. NJNITEHAWK
    njnitehawk Win User

    Unable to run full scan on Windows Defender

    ran into the same problem

    d/l one of the free programs

    to make sure everything is ok

    i stopped using W/D
     
    njnitehawk, Aug 29, 2015
    #4
  5. BORG 386
    Borg 386 Win User
    Try running a SFC to see if there's anything that needs fixing. Be sure to run it 3 times since it doesn't always fix everything the 1st or 2nd time.

    SFC Command - Run in Windows 10 - Windows 10 Forums

    Another option would be to do a repair install.

    Repair Install Windows 10 with an In-place Upgrade - Windows 10 Forums
     
    Borg 386, Aug 29, 2015
    #5
  6. TAIRIKUOKAMI
    TairikuOkami Win User
    SFC scan does not repair WD, as far as I can tell, never did restored mine (multiple scans).
     
    TairikuOkami, Aug 29, 2015
    #6
  7. YOU
    You Win User
    could try restarting in Safe Mode and attempting to run the scan, although Windows Defender is not a very good antivirus so might as well download Avast now if want a free one that's actually decent. Safe Mode - Start Windows 10 in - Windows 10 Forums
     
    You, Apr 5, 2018
    #7
Thema:

Unable to run full scan on Windows Defender

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