Computer Virus.. Help!?

I have this virus i think

It has made my computer wallpaper say :

"YOUR PRIVACY IS IN DANGER

Download Privacy Protection Software" and every time you click on the wallpaper a website pops up

Every so often, the bottom tool bar disappears, then i get a message from Norton Anti-Virus (The anti-virus i use) that it has blocked Trojan Horse! Is that the virus?]

I have scanned my computer several times, and it doesn't find anything!

Any help would be really appreciated, thanks

Computer Virus.. Help!?panda

The "YOUR PRIVACY IS IN DANGER

Download Privacy Protection Software" advertising that you are seeing IS the virus. It is a scam.

Is that scam advertising trying to sell you, one (or more) of these useless products? Don't buy anything that it is advertising It's a scam! If it is one of these, then it is likely an infection called Smitfraud that is causing the phony warnings. It is scam advertising trying to swindle you. And a link to a free removal tool is down at the bottom.

AdwarePunisher,

AdwareSheriff,

AlphaCleaner,

Antispyware Soldier,

AntiVermeans,

AntiVermins,

AntiVerminser,

AntiVirGear,

AntivirusGolden,

AVGold,

BraveSentry,

MalwareWipe,

MalwareWiped,

MalwaresWipeds,

MalwareWipePro,