Microsoft's pursuit of Yahoo may have run into some bumps, but its big software business is humming along smoothly.

The company reported quarterly earnings Thursday that slightly surpassed Wall Street's expectations, and it provided an optimistic outlook for its 2009 fiscal year, which begins in July.

The faltering American economy, Microsoft executives said, has not had a big impact on the company. Two-thirds of Microsoft's revenue now comes from overseas sales, and demand for many of its products remained healthy in the United States.