Window 7 64-bit Home Premium. When starting the computer the desktop icon appear w/their symbols, the internet connects (my weather bug gadget shows up to confirm the connection). Then the computer ‘blinks’ all the desktop icons lose their symbols and become plain folders symbols and after a few seconds they begin returning to their normal symbols again. The HD seems to be working a lot during this process (light is on solid). Got any help to stop this second ‘boot’ at start up?