I have a A75 S226 too. Runs smoothly, fast and quiet, but when I press the underside with my hand I get a blue screen of death.
I am dealing with CompUSA to see if they can repair this problem. My laptop also have a sporadical 'tick' noise
in the hard drive but I performed a lot of test to my HD and it seems to be running perfect. I upgraded the memory to 1GB and I planning to upgrade the HB with a 80GB HD.