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NetApp Knowledge Base

VScan engine not able to detect virus (EICAR) due to Microsoft defender

Last Updated:

Applies to

  • ONATP 9
  • VScan
  • Trend Micro ServerProtect
  • Microsoft Defender


  • An infected (EICAR) file can be written on the CIFS share with vscan enabled without any issues
  • AVshim debug log shows that scan request was completed with VSENGINE_INTERNAL_ERROR_NOBLOCK


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