電腦突然失去IP地址不能上網,急!急!急!

我有兩台電腦用CABLE MODEM上網.10月28日晚,我在一台手提電腦上看新浪新聞.沒關機,1小時後,突然不能上網, 經檢查, IP地址已被更改. 想用"ipconfig -renew"恢複IP地址失敗. 手動設置IP地址後仍不能上網.應該自動設置IP地址,但是,自動設置的IP地址是錯的.現在隻能一台機器上網.請怎樣設置IP地址才能上網.以下是具體信息:
Your computer was unable to automatically configure the IP parameters for the Network Card with the network address 000BDBD64691. The following error occurred during configuration: WSAStartup cannot function at this time because the underlying system it uses to provide network services is currently unavailable. .