Windows 10: Problems with Windows Defender AntiVirus full scan

Discus and support Problems with Windows Defender AntiVirus full scan in Windows 10 Ask Insider to solve the problem; I'm on Windows 10, 2004. When I run a quick antivirus quick scan using the built-in Windows Defender, it works and returns zero threats. If I run a... Discussion in 'Windows 10 Ask Insider' started by /u/highwire_ca, Sep 23, 2020.

  1. Problems with Windows Defender AntiVirus full scan


    I'm on Windows 10, 2004. When I run a quick antivirus quick scan using the built-in Windows Defender, it works and returns zero threats. If I run a full scan from the settings UI, it will run for about 25 minutes, then the antivirus background service either stops or crashes, and the notifcation area tells me that action is needed. If I run a full scan from powershell using 'MpCmdRun.exe -Scan -ScanType 2' (2 is a full scan), it runs to completion in about 4 hours and returns zero threats. The full scan borks from the settings UI even after a 'refresh' (clean install) of Windows 10 with all the latest updates. The computer itself is not overclocked or anything like that, and has no other issues. Any advice?

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    /u/highwire_ca, Sep 23, 2020
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Problems with Windows Defender AntiVirus full scan

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