A New York court has ruled that Network Associates, a maker of popular antivirus and computer security software, may not require people who buy the software to get permission from the company before publishing reviews of its products. The decision, which the company has vowed to appeal, could carry a penalty in the millions of dollars, according to Ken Dreifach, chief of the Internet bureau of the office of the New York State attorney general, Eliot Spitzer. Last spring, Mr. Spitzer sued Network Associates, which has its headquarters in Santa Clara, Calif., asserting that the company's software included an unenforceable...