Windows 10: windows defender cant find threats after allowing them before resetting my pc

Discus and support windows defender cant find threats after allowing them before resetting my pc in AntiVirus, Firewalls and System Security to solve the problem; windows defender can find threats after allowing them before resetting my pc I allowed some threats on which was detected on my pc . i later reset it... Discussion in 'AntiVirus, Firewalls and System Security' started by HamzaAdam, Jun 5, 2019.

  1. HamzaAdam Win User

    windows defender cant find threats after allowing them before resetting my pc


    windows defender can find threats after allowing them before resetting my pc

    I allowed some threats on which was detected on my pc . i later reset it using keep my files making those threats still available.

    After resetting windows defender cant find these threats again but i still have these files on my pc

    :)
     
    HamzaAdam, Jun 5, 2019
    #1
  2. Try3 Win User

    Windows defender false positive - forced to allow threat


    Windows defender has started to identify C:\Windows\System32\mshta.exe as a threat [normally reported as a Trojan Powessere.G]. I use mshta.exe to run an hta custom MsgBox - I have been hoping to keep using my current CustomMsgBox tool [batch file calling a vbs-hta file] until later this year when I hope to have had enough time to replace it with a PowerShell alternative.

    Windows defender's notification lets me "allow the threat" but that seems to me to be a bigger security hole than is necessary - it will now ignore a potentially real intrusion when all I want to run is a genuine Windows component. My immediate problem is fixed but I would prefer to fix the false positive using the exclusions list.

    I cleared the 'Allowed threats history' so I could use the exclusions list instead. I added C:\Windows\System32\mshta.exe to the file exclusions list and I checked that it had taken properly by checking the exclusions list both in the UI & in the Registry. But the exclusion made no difference, it continued to detect and block the exe.

    I have repeated the attempt several times [by clearing the allowed threats list & exclusions list beforehand] and the results are the same every time
    - allowing the threat works,
    - using the exclusions list has no effect.

    I studied the relevant tutorial but have not spotted an error in what I have been doing - Add or Remove Windows Defender Exclusions

    Does anybody with experience of using the exclusions list to counter false positives have any suggestions for me?

    Denis
     
    Try3, Jun 5, 2019
    #2
  3. gagagaON Win User
    Is restoring a quarantined threat the same as allowing the threat?

    My Windows defender scan reported a threat last week. I quarantined it. After a few days, I updated my defender virus definitions, restored the threat, and ran another scan (because I wanted to find out if it was a false positive). This new scan did not
    report any threat.

    However, under defender's threat history, allowed items, I see this threat listed. I do NOT want to allow the threat, just wanted to find out if the latest definitions would still reported the file as a threat. How should I do that? Thank you. I am using
    windows 10.
     
    gagagaON, Jun 5, 2019
    #3
  4. Bree Win User

    windows defender cant find threats after allowing them before resetting my pc

    Windows defender false positive - forced to allow threat


    But are you really sure you're trying to run a genuine windows component, or perhaps the genuine file has been replaced by malware? If I right-click on my C:\Windows\System32\mshta.exe and scan with Defender it passes it as clean (1803 with the latest defender definitions).


    mshta.exe is often targeted by malware that likes to hide itself under a 'legitimate' name. You should scan with AdwCleaner as a first step, then attach the resulting log files to a post for further advice (find them in the C:\AdwCleaner folder).

    AdwCleaner - Free Adware Cleaner & Removal Tool
     
    Bree, Jun 5, 2019
    #4
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windows defender cant find threats after allowing them before resetting my pc

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