Hi, great topic. Since yesterday I'm having the same problem, after all day of headaches and reading forums, I finally solved it. I made everything like you said it in the tutorial and discovered that the problem was from ACPI.sys, but it wasn't neither the BIOS, nor the Chipset... Actually it was very simple, the battery of my laptop fu**ed up, it was draining faster than it was charging, I removed the battery and left it to work only on charger, problem solved... For those who have driver problems I recomend Driver Genius Professional Edition, this program finds drivers out of date and updates them, since at first I did not knew that the problem was from the battery I tried every stupid driver updating program and this was the best one...
