When trying to download/install the app via PortableApps Platform I receive and error message: "The downloaded copy of Trellix Stinger is not valid and can not be installed. This could be due to an incomplete download or other network issue. Please try running the updater again when complete.".
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https://portableapps.com/search/node/type%3Aforum%20%22is%20not%20valid%...
“Life is a strategy game, where roles are already distributed”
― Neo Buddha ―
I ran into the same problem on Jan 6th, so I uninstall McAfee Stinger and tried to add the Trellix Stinger and it failed also.
Just tried to add the Trellix Stinger app via the PortableApps interface and it failed again (error message: "The downloaded copy of Trellix Stinger is not valid and can not be installed").
I finally got it installed by downloading the app from here and then used the "Install A New App (paf.exe)" to install it
This is fixed with an installer rebuild allowing the platform to properly download the files from the publisher. Apologies for the inconvenience.
Sometimes, the impossible can become possible, if you're awesome!