Thanks guys. Thought you might be interested to know..... Thought I might try reinstalling windows but, as I didnt have the disc for XP home edition I loaded a copy of XP pro I have. I loaded it in parallel with the home edition so now it asks which I want to load when it boots up. I have not run the old home edition for long but it is all there and intact possibly still with the problems it seemed to have. But certainly when I run it on Pro it,s as cool as a cucumber. Sounds like it was a software issue. Just thought I'd let you know. Mike.