The Windows Filtering Platform (WFP) drivers were not unhooked. Solution:
In the lifecycle of endpoint management, the transition from one security vendor to another is a critical operation. McAfee (now Trellix) products are designed to be persistent and resilient against malware attempts to disable them. Consequently, when a legitimate administrator attempts to remove the software, the system often encounters "Access Denied" errors, leftover services, and registry keys that remain active. Incomplete removal creates a "zombie" state where the old antivirus consumes resources without providing protection, often blocking the installation of new security agents. remove mcafee from windows