(Corrects 12th paragraph to clarify that 59 percent of Time Warner Cable customers, not all cable customers, are unsatisfied with service; corrects capitalization in analyst company to "cg42" from "CG42") By Jim Finkle, Marina Lopes and Alina Selyukh BOSTON/WASHINGTON, Aug 27 (Reuters) - Time Warner Cable Inc, the No. 2 U.S. cable operator, suffered a massive network outage on Wednesday due to suspected human error that cut Internet services to some 11 million businesses and residences, prompting a New York state investigation.