Looks as if you have clicked on the left hand banner... either this is trying to do what it says it's going to do (that is scan your PC) or else it wants to implant some spyware. Maybe both. My advice is to click cancel and try not to click on the ad again (unless you actaully want to find out what it does).

i got the same error reading ur reply beppe i dont click on none of the banners tho

Maybe Veriac can reply - does the game do something which may be affected by customised or high security settings in IE?

It's also possible that some spyware is trying to launch a pop-up which your settings are blocking. Sorry, I use the PC version so I don't know the current ad set so well.