Oh no !!!! Facebook is a haven for stuff like that.
I don't have the computer skills to help you out at all....sorry about that.
But, if you can find out the name of the particular virus you've got, you may be able to do a search and find a site that will instruct you how to get rid of it.
Can't Norton identify it for you ????
If not, you could possibly download the free trial version of AVG, and run a scan ??? That may at least identify the little beastie.
Best of luck with that one mate.
Wom