Microsoft on Wednesday outlined a broad new offensive against Google as it laid out plans to insert the targeted advertising generated by its new AdCenter system into a range of digital services beyond internet search.

Steve Ballmer, chief executive officer, is set to give a fuller account of the plan on Thursday when he speaks to representatives of big advertisers and leading advertising agencies at a conference at Microsoft's headquarters.

The tabular content relating to this article is not available to view. Apologies in advance for the inconvenience caused.According to advance details of his speech supplied by the company, he will also announce that all adverts on MSN in the US are now supplied by Microsoft's own ad network, fully competing for the first time with the more established networks of Google and Yahoo!.

The presence of the company's software on all sorts of devices, from the Xbox 360 games console to mobile handsets, gave it a wider platform that would serve as an outlet for its recently created advertising network, said Blake Irving, vice-president in the company's new Windows Live division.

Mr Irving's comments mark Microsoft's latest bid to persuade advertisers that it can start to close the widening gap with Google, whose dominance of the search advertising business has given it an ever greater influence over targeted interactive advertising.

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