Occasionally, my computer becomes slow and unresponsive. I would shut-down the computer and re-start it. As it’s shutting down, near the end of its shut-down cycle, a pop-up window appears asking if I should Abort or Continue a Download that is in Process. I have no idea what the Download is. Having a healthy level of paranoia, I fear the Download might be some kind of malicious spyware or somesuch. Could somebody tell me how to investigate this and find out exactly what this mysterious Download might be?