Another thing: from the very first day that I got my computer in my hands, I experienced the following problem:
After some minutes of work (especially when connected to the mains) the screen turns to a yellow/green color and the computer stops responding. I have to shut it down manually and restart it and most of the times it does not happen again, not until I shut it off and turn it on the next day.
The same thing happens also when running on battery (I first noticed it when I was using my VAIO`s battery).
Any assistance also on this issue?