There is a peculiar problem from last two days in my acer aspire 3620 laptop. The problem is that whenever I tried to type any text document in Microsoft office tool application or into the Notepad, the laptop, stopped working along with this the keys in the keyboard and the mouse also stopped working. My system is running with windows vista ultimate OS. Other specifications of my machine are like NVIDIA graphical interface along with this 3 GB RAM, 456 GB hard drive, Intel core 2 duo processor. After the problem appeared in my machine I need to turn off my machine by direct press the power button. What should I do to resolve this issue? Any suggestion on this will be appreciated greatly.