Got Pavillion 22 been okay for past 4 months (it's 2 years old) but keep getting attached error message. have to turn-off power for 10mins then it works for a bit then happens again - right pain! makes clicking noise all time too. Had replacement hard-drive last year. Anyonegot any ideas what causing? Need PC as daughter doing her GCSEs at minute and unreliable PC ain't helping!!