(3. You need to know the conflicting mac addresses, and windows will record these errors. The specific method is as follows: Right-click [My Computer]--[Manage]--Click [Event Viewer]--Click [System]--View the source as [tcpip]--Double-click the event to see the display address generated conflict, and record the mac address, please copy the mac address and fill it in the local mac address input box of antiarpsniffer (please note that the : is converted to -), click [protect address conflict] after the input is completed, in order to make the mac address effective Please disable the local network card and then enable the network card. Enter ipconfig/all in the cmd command line to check whether the current mac address matches the mac address in the local mac address input box. If the change fails, please contact me. If successful, the address conflict will no longer be displayed.)