A laptop ( Fujitsu Siemens Amilo Xi 1554 ) of a friend of mine started to crash and
display garbage on the screen .. Unfortunately due to Windows 7 not allowing unsigned drivers ( in order to underclock the ATI card onboard to reduce heat ) the only solution was to improve the hardware cooling , since you can add a fan without it beeing signed by Microsoft..
The system has become stable again , and all seems well..!
I hope my friend doesn`t mind the new design of his laptop ;P