i done a system restore mate,and it sorted it but would love to know how this can happen,if you could tell me,as i was scared to do what you suggested ,as i am only a beginner mate ,but i am off to look at it now ,thanks for your help mate i love this forum full of good guys like yourself ,helping a dummy like me.
thanks mate
p.s i did not make any changes to the system e.g install new programms etc