Microsoft Corp said on Thursday Chief Financial Officer Peter Klein was leaving the company, as it struggles with sharply declining personal computer sales and a lukewarm reception for its new Windows 8 operating system.

The world's largest software company reported a profit of $6 billion, or 72 cents per share, in the fiscal third quarter, up from $5.1 billion, or 60 cents per share, in the year-ago quarter.

Profit was boosted by some deferred revenue from its Windows, Office and video game operations, but cut severely by a big fine by European antitrust regulators for breaking promises relating to expanding the choice of Internet browsers on Windows.

(Reporting by Bill Rigby)