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Njuguna_Muriithi's avatar
Njuguna_Muriithi
Copper Contributor
Apr 15, 2024

Uninstalling mcafee Trellix agent from Windows Pc's

Hello,   We are currently deploying Microsoft Defender for Endpoint Plan 2 to a client who had Trellix Security formely Mcafee and we are experiencing issues with the uninstallation of the Mcafee a...
DylanInfosec's avatar
DylanInfosec
Iron Contributor
Apr 15, 2024

Hey!

I would make sure there’s no GPO that was pushed out to turn Defender off when McAfee was used. Run a “gpresult /r” and see what you find.

Or check via gpedit.msc. Go to
Computer Configuration > Administrative Templates > Windows Components > Windows Defender Antivirus. Double-click on “Turn off Microsoft Defender Antivirus.

 

I also recommend reading Defender AV compatibility with non-Microsoft AV here: https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/microsoft-defender-antivirus-compatibility?view=o365-worldwide#microsoft-defender-antivirus-and-non-microsoft-antivirusantimalware-solutions

 

It was a while ago when I ran into this same issue, similar setup but can you give us a list of what you’ve tried and checked? Maybe we can narrow it down.

Let us know what you find there.

Best,
Dylan

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