Ronald downloads a movie from the Internet. During this process, his system gets affected by malicious software. The file does nothing initially and his system functions as usual for a few days. Later the file reproduces itself and starts to slow down his system. In a month's time his system is fully affected by the malware. Which of the following is most similar to the situation described here? Albert visits a travel Web site to book a flight from New York to Los Angeles. He visits the Web site from his computer after 15 days and his home page is set by default to book return tickets from Los Angeles to New York