In order to ensure the security of the software, operating system developers generally provide code signatures as proof. What happened recently at Microsoft may inadvertently damage the user’s impression of this method. BleepingComputer said that Microsoft confirmed that they have certified the third-party driver Netfliter. Later, network security researcher Karsten Hahn discovered a few days ago that Netfilter contained a rootkit of malware circulating in the gaming community and connected to a malware control server located in China. , But in this case is still recognized by the Windows Hardware Compatibility Program.