hi have had my (macbook os x. v10.5.8 ) p 2ghz intel core2 duo . m2gb. for the last 18 months. My worry is that 1 wk ago when browsing my phone number came up on my screen about 4 inches high and they asked me to do something and click ok , real dumb as I am I clicked ok . it then disappeared. now I am worried , will welcome any help . thanks in advance.