弟也有這種情形 一開機後就狂丟封包
但是用掃毒又掃不出來
用NETSTAT -N看就會看到

Active Connections

Proto Local Address Foreign Address State
TCP 220.143.127.2x:139 218.175.189.113:2332 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.71:2097 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.138:4401 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.138:1902 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.196:1545 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.196:1882 ESTABLISHED
TCP 220.143.127.2x:139 220.143.127.196:3194 ESTABLISHED
TCP 220.143.127.2x:139 220.188.204.79:3078 ESTABLISHED
TCP 220.143.127.2x:139 220.188.204.79:1747 TIME_WAIT
TCP 220.143.127.2x:139 220.188.204.79:1776 ESTABLISHED

目前也尚不知解決法 雖然知道用防火牆可擋但是W98沒內建還要另行加裝...