Ok, it started and air was blasting out of the vent at the back of the PC so it is the fan like I thought ................ it does feel quite warm in that small area of the vent but the rest of the outside of the unit is really quite cool. It is a normal fan type noise (no rattling or anything) just like a turbo mode.
It first started up when the screensaver came on, clicking the screen doesn't stop it but changing to another page does ................. then it was coming on every couple of minutes for no apparant reason ..................... had a few windows open but not doing anything much ie. only on here with a few windows open.
Have shutdown PC and rebooted so will see what happens now.
Casalguidi
