Slipping into the red for the first time in nearly three decades, Microsoft has reported a loss of $492 million in the June quarter due to a non-cash write-down of $6.2 billion related to non-performance of online advertising business.

The staggering charge is due to non-performance of its Internet services division, aQuantive, which Microsoft had snapped up five years ago. This is for the first time since 1986, when it went public, that Microsoft has clocked a quarterly loss.

In the three months ended June 2011, the company had a net income of $5.87 billion.

“The financial results reflect the previously announced non-cash, non-tax-deductible income statement charge of $6.19 billion for the impairment of goodwill and the deferral of $540 million of revenue related to Windows Upgrade Offer,” the company said in a statement on Thursday.

Nevertheless, Microsoft’s 2012 June quarter revenues climbed 4 per cent to $18.05 billion. The revenue stood at $17.36 billion in the same period a year ago.

Apart from the 12.6 per cent decline in revenue of the Windows Division due to the deferral of Windows upgrade, the company recorded 12.5 per cent growth in revenue from its Server tool business. Business division too saw a growth of 7 per cent.

“We delivered record fourth quarter and annual revenue, and we’re fast approaching the most exciting launch season in Microsoft history,” Microsoft CEO Steve Ballmer said.

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