Hello again Clive, that does seem a long time when mine plays up it lasts a day or so , you are right to be concerned perhaps your local computer man may help, I have anti virus by avast and it has always been good but trouble is as you know new ways to infect your computer appear daily. I hope you get sorted and if in doubt don't open any unsolicitied emails or sites until you are sure things are ok. Best Wishes David