I downloaded and installed suduku master for my nokia 5800 XM.After 5 minutes of play the screen got darker and the screed wouldint go off when I locked it.So I turned it off.Then I had problems with turning it back on again! It just vibrated and wouldint turn on. But finally it turned on. I started playing the game again and the same thing happened but now I cant turn it on!!!!! please help... Is it a virus?