Pop up windows 求救

我计算机上的google search tool 被hijack. 当我click 搜寻结果连接时，address bar shows the address as the search result, but the page is different, which is a marvell search co. I tried to use spybot to clean it. it did not work. Mircosoft antispyware scan found two items:

1. trojan.startuo.nameshifter
2. vertumondo.

They can be removed but will jump out again. Too boring

请哪位大侠能帮忙解决问题。万分感谢。