By Michael Gold TAIPEI (Reuters) – Investors looking for specifics as to the future of Acer Inc, the worlds No.4 PC vendor, came away disappointed when the new CEO spent more time delivering a history of the companys past mistakes than on where it was headed. Jason Chen, the latest executive to step through the revolving door to the CEOs office, said during his first press conference on Monday that the Taiwanese companys biggest mistake was investing too early in touch-panels and ultrabooks and not realizing the extent to which tablet computers like Apple Incs iPad would disrupt the PC industry. Acer has been struggling with losses for several quarters, including a T$13.12 billion ($437.98 million) deficit in the third quarter of 2013. According to data from research firm IDC, Acer saw a 21.4 percent fall in PC sales during the fourth quarter from a year earlier, by far the largest of all major vendors.