:Applaud :Applaud :Applaud :Applaud :Applaud
One of the issues with Vista was it was always file swapping and grinding away at the cpu, so loads of HD activity.
I think on the Acer the probe for the fan is on the cpu, so if the cpu is working away the fan is running to demand.
If I stream full screen the air out of the exhaust is hot, and if you restrict the airflow underneath it will start acting weird before shutting down or crashing. Since it's been on a wedge is not been a problem, mine has no fans its just a wedge, but my son has one with 2 fans, his has also been fine since.
I think with Ubuntu Dave you will have a much better OS system as Vista was pants, however W8.1.1 :innocent