well, i got a viris from a pop up on my space.
the viris, is atomaticly detected and deleated every time, so i only get the pop up from my nortan viris scan *2005*. but its keeps trying to reinstal its self, evey time its dealeted befor anything happens automaticly. i figered it must be spy whear and scaned with norton, ad wear. and spy bot shercj and destroy. i dealet all spy whear, and put it in safe mode then do it all over agin to make sure i got every thing... when i restart normaly the viris keeps trying to get on but keeps geting dleated.. its a
"download.trojan"
some one help??

It sounds like Norton is removing the active file on each boot but is not removing the original trojan. Try this free online scan from Trend Micro:

LINK (http://housecall.trendmicro.com/)

Btw, Adaware and Spybot will not solve this problem as it is a trojan, not spyware.