Well I would advise you to open the PC and see if the clicks are coming from the hard drive....normally hard drives will click if it's become dirty inside. this would suck lol If it's coming out of your speakers....you probably have some spy/mal/adware . Download AVG Antispyware from here for free... free.grisoft.com at the bottom of the page and then update it and scan your complete computer. Should speed it up and remove the clicking noise. ;-)
Norton Ghost is a pgm... i was being silly. :-|
just another wee thought...that home page of yours... it doesn't have any embedded gifs with crabs clicking claws, does it? Cos your log is clean.... leave your Norton alone... :)
You're prob cranky at me for saying that but i don't know what is on your homepage, and flash player files running in the backgound can still put their audio out.
One other thing, go control panel > sounds and audio devices > sounds tab and select No Sounds, Apply and ok.