|I just checked the Hardware List inside Control Panel again and noticed that the yellow exclamation mark is no longer there. (It may be due to the improved driver that I downloaded and installed several days ago.)|
However, when I open a window (Explorer) in the 2nd Mon(the external display card), the frozen OS problem still existed.
I can make many clicks on different directories without any problem, but whenever I click on the header bar (the blue one) of the window on the 2nd mon, the machine got frozen immediately and no longer response to any subsequent keystrokes of mouse movements. I was then forced to reboot.
I have once suspected it might be a thermal preoblem, but this concern has been ruled out because I can work/stay inside the Explorer window for a very long time and operate smoothly ---- until I click the header bar and then the system hung.