Windows Defender quarantining out of control RRS feed

  • Question

  • Since last Friday Oct 2. Windows Defender on my Windows 8.1 laptop has been constantly quarantining files of all kinds, and hundreds of files have been quarantined, including outlook.exe, access.exe, jpegs, access databases, executables, logs, task scheduler tasks, ini files, etc. The MS Office programs seemed to have healed itself but some files have disappeared.  According to Windows Defender, it detected PWS:HTML/Phish.GK However, this appears to be transmitted by an html file, so it does not make sense for it to be quarantining non-html files. There are a few html files that it correctly identified as a phishing file related to the tangerine financial institution, but I am suspecting the virus signature for this matches many files in my system and is thus quarantining them. Is there any other reports of this, or has my virus definition file been tampered with. Any assistance troubleshooting is appreciated. I have installed Avira in place of Defender and it does not detect any viruses. 
    Wednesday, October 7, 2015 4:36 PM


  • Hi,   

    After reading your state, I infer the most possible reason for your issue is virus. Have you tried to run the Windows Defender in safe mode?

    For one possibility, the virus infect the system process and other normal process, so the Windows Defender quarantined them. Windows Defender will not delete your personal files unless you set deleting files upon detecting virus. Maybe the virus cause it.

    I suggest you scan the virus in safe mode first to check the issue. Besides, you can try to restore the items which quarantined by Windows Defender.

    Wish you will troubleshoot the issue smoothly.

    Best Regards


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    Thursday, October 8, 2015 8:58 AM

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