A day after Hewlett-Packard Co. announced a big drop in profits, H-P Chief Executive Meg Whitman said that the technology giant is at the beginning of a multi-year transformation. Ms. Whitman, speaking at a Wall Street Journal event in Menlo Park, Calif., on Thursday, said that H-P had a bright future but that it would take some time for the company to fully recover from more than a year of turmoil and missteps. “What H-P needs is a steady hand on the tiller,” she said.