Cybersecurity developers have created a tool called defendnot, which disables Windows Defender by utilizing undocumented Windows Security Center (WSC) APIs. This tool is a successor to the no-defender project, which was taken down due to DMCA challenges. The developer reverse-engineered WSC’s validation algorithms and identified Taskmgr.exe as a suitable process to host the necessary code. Defendnot persists across reboots by adding itself to Windows autorun and can be managed via a command-line interface with options to disable Windows Defender and Windows Firewall. Unlike its predecessor, defendnot does not use third-party antivirus code. Security experts warn that disabling protection mechanisms should only be done in controlled environments by knowledgeable users.