Is there a way to get rid of the spy-ware/ virus called antivirus XP2008?

is there a way to get rid of the spyware/ virus called antivirus XP2008
desk top computer...gateway..three years old OS is XP
Update: It seems that every time i try to go to one of the site everyone has suggested, the web site won't load...i can connect to the internet and get to yahoo but not much beyond that...is this part of the virus? if i start up in safe mode will that help me get in? how do i start up in safe mode?
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