hello, it hangs or hangs it can test several factors, overheating, damaged hard disk or some capacitor in the bloated plate, but that shoot flashes the camera gives me to think of viruses, there are commands that are written in the DOS console and are able to open the cd reader without pressing the button or play games with the led lights of the keyboard, I would not wonder if some virus makes your camera flash, well known is that a virus is a file with commands that are executed when a user opens, so start on that side and comment, pass a good antivirus and if necessary, format the pc and install an opérativo system to zero, greetings