Microsoft endured an operating loss of $2.1 billion for the most recent quarter, the software giant has revealed in its last financial results before the launch of Windows 10. The heavy loss, which works out to be a loss per share of $0.40, is largely accounted for by the $7.5 billion impairment charge relating to its acquisition of Nokia, and a restructuring charges of $780 million and $160 million, though the rest of the financials appears to be more positive for the company.