New 'Defendnot' Tool Tricks Windows into Disabling Microsoft Defender

A new tool called 'Defendnot' allows Microsoft Defender to be disabled on Windows devices by registering a fake antivirus product, even when no actual antivirus is installed. This process tricks Windows into believing that another security software is active, thereby disabling Microsoft Defender. The article does not provide specific technical details on how 'Defendnot' works. The main impact is the disabling of Microsoft Defender, leaving systems vulnerable to threats.