netstat -ano|findstr "443"         //搜索443端口占用情况，并找到进程ID
TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 720            //找到PID为720
UDP 0.0.0.0:59443 *:* 7584
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tasklist|findstr "720"                     //查找PID为720对应的进程名
QQDownload.exe 720 Console 1 56,156 K            //找到是QQ旋风占用，结束掉进程。OK