The losses caused by the purchase of aQuantive by Microsoft and the failure of the advertising specialist to develop may cause Microsoft to publish a loss for the first time in over a decade.

Analysts had previously reported that the failure of the online advertising company to grow would only cost $5.3 billion however the figure has now been revised to nearly $6.3 billion.

AQuantive commented that: “While the Online Services Division business has been improving, the company’s expectations for future growth and profitability are lower than previous estimates."