Windows Defender offline scan

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  1. Posts : 723
    ,7,8.1 10TP 10upgrade,MINT
       #1

    Windows Defender offline scan


    What's the consensus on the WD offline scan, any good?
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  2. eLPuSHeR's Avatar
    Posts : 2,473
    Windows 10 Home x64
       #2

    Yes. It can be useful for thoroughly cleaning an infected computer. Some malware is very difficult to remove when the system is up and running.
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  3. Posts : 13
    windows 10
       #3

    I cannot get the Defender offline scan to work. Hmmm. I don't know if it ever worked before. First time I tried it was today. Version 1809 Win 10 pro. Perfect running machine. No hiccups. SFC test passes. I click on offline scan and hit the "scan now" button and a box pops up. I say yes....then it does not do anything. No restart. Same if I try it from the elevated command prompt. Just hesitates for a second and goes back to a new elevated C prompt. Maybe a glitch with Windows ? I searched for a while and came up with nothing else to try. Other than that, Defender scans fine if I do it the normal way. No big deal but I am curios about this problem. Thanks for any ideas.
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  4. Bree's Avatar
    Posts : 19,269
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #4

    joe1982 said:
    I cannot get the Defender offline scan to work. Hmmm. I don't know if it ever worked before. First time I tried it was today. Version 1809 Win 10 pro. Perfect running machine. No hiccups. SFC test passes. I click on offline scan and hit the "scan now" button and a box pops up. I say yes....then it does not do anything. No restart. Same if I try it from the elevated command prompt. Just hesitates for a second and goes back to a new elevated C prompt. Maybe a glitch with Windows ? I searched for a while and came up with nothing else to try. Other than that, Defender scans fine if I do it the normal way. No big deal but I am curios about this problem. Thanks for any ideas.

    I found that there appears to be a bug in 1809 for Defender Offline. There is a registry key involved and if that doesn't exist yet then first time you try it It will fail - but then seems to work the second time. See this post and post #135 where I identify the key. Try creating it and set it to 0x0 if you do not yet have it.

    Cumulative Update KB4480116 Windows 10 v1809 Build 17763.253 - Jan. 8 Windows Update - Page 14 - Windows 10 Forums
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  5. Posts : 13
    windows 10
       #5

    Thanks for the reply. I found the offlinescanrun and it is set to 0x00000000. I tried to modify to 1 then realized I should have left it at 0, and it said "Cannot edit OfflineScanRun: Error writing the value's new contents" So it is still 0. I am not proficient at registry mods so I need to be careful.
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  6. Bree's Avatar
    Posts : 19,269
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #6

    joe1982 said:
    Thanks for the reply. I found the offlinescanrun and it is set to 0x00000000. I tried to modify to 1 and it said "Cannot edit OfflineScanRun: Error writing the value's new contents" I am not proficient at registry mods so I need to be careful.
    Now the key exists, try running Defender Offline again. It should now be able to set the key to 1 itself to trigger the scan at next boot.
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  7. Posts : 13
    windows 10
       #7

    The key was there and set to 0, I didn't have to create it. I tried to run the scan offline again and nothing happened. The box did pop up asking for permission and I said yes and that was it. I checked regedit and the value is still at 0 and cannot change it. Hmmm Thanks. This is no big deal to me but is interesting.
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  8. Steve C's Avatar
    Posts : 6,385
    Windows 10 Pro 64 bit
       #8

    Bree said:
    I found that there appears to be a bug in 1809 for Defender Offline. There is a registry key involved and if that doesn't exist yet then first time you try it It will fail - but then seems to work the second time. See this post and post #135 where I identify the key. Try creating it and set it to 0x0 if you do not yet have it.

    Cumulative Update KB4480116 Windows 10 v1809 Build 17763.253 - Jan. 8 Windows Update - Page 14 - Windows 10 Forums
    Yet another example of sloppy MS software engineering
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  9. Posts : 13
    windows 10
       #9

    I guess there is not much I can do about it. The previous 7.58am event said the same thing, then I rebooted and tried to run the offline scan again.Then rebooted once again and copied the log. Thanks.
    Windows Defender offline scan-event-8-06am-3-24-19.jpg
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  10. Posts : 65
    Windows 10
       #10

    Hello. I now have the same problem. I have tried a few times to get offline scan to work and no joy. I found this thread. Did it work for anyone? I noticed that my machine does not have the referenced registry key...should I create it and, if so, what type of key do I select so as to enter 0?
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