Microsoft saw its profits leap by 35 per cent in the first three months of 2010 as its Windows-7 operating system continued to prove popular. The software giant made a net profit of 4 billion dollars and said it had also seen strong growth from its Bing search engine business and XBox Live. Sales hit a record 14.5 billion dollars, 6 per cent more in the same period last year. Windows-7 has proved to be Microsoft's best-selling operating system to date after the disappointing Vista. Yahoo and Apple announced higher profits earlier this week while Google reported strong figures last week.