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Need to research: Nirlauncher v1.23.42 to 1.23.43 upgrade through Chocolatey fails with “Operation did not complete successfully because the file contains a virus or potentially unwanted software.”

Posted by jpluimers on 2021/04/23

I had a curious error despite the build not having any failures on VirusTotal:

You have nirlauncher v1.23.42 installed. Version 1.23.43 is available based on your source(s).
nirlauncher not upgraded. An error occurred during installation:
 Operation did not complete successfully because the file contains a virus or potentially unwanted software.

nirlauncher package files upgrade completed. Performing other installation steps.
The upgrade of nirlauncher was NOT successful.
nirlauncher not upgraded. An error occurred during installation:
 Operation did not complete successfully because the file contains a virus or potentially unwanted software.
choco upgrade throwing virus error during nirsoft 1.23.43 update

choco upgrade throwing virus error during nirsoft 1.23.43 update

When upgrading, this briefly is visible in the Windows Security view “Virus & thread protection”:

So I need to figure out a few things before I can upgrade Nirsoft:

  1. Where choco upgrade downloads temporary files
  2. Where these temporary files store their intermediate and final files during installation
  3. How to temporarily exclude the locations of 1. and 2 in Microsoft Defender.

–jeroen

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