MOUNTAIN VIEW, Calif. (

TheStreet

) --

Google

(GOOG) - Get Report

said that it is hardly shocked by rival

Microsoft's

(MSFT) - Get Report

attempt to embroil the search giant in a

deepening EU antitrust battle

.

Microsoft recently filed a formal complaint with the European Commission as part of the regulator's ongoing probe into Google. In a 1,547-word blog post that appeared late Wednesday, Microsoft's General Counsel Brad Smith accused Google of exploiting its dominant search position to impede competition in areas such as mobile devices and Internet video.

Google says that it is not surprised by Microsoft's move to embroil the search giant in a deepening EU antitrust battle.

"We're not surprised that Microsoft has done this," said a Google spokesman, in an email to

TheStreet

. He added that the software giant's

Ciao! from Bing

subsidiary was one of the original claimants when the

EU launched its antitrust probe

into Google last year. "For our part, we continue to discuss the case with the European Commission and we're happy to explain to anyone how our business works."

Google, currently in the

midst of a CEO reshuffle

, is no stranger to antitrust struggles. But it seems as though Microsoft is keen to make things as difficult as possible for its search rival.

"We're concerned by a broadening pattern of conduct aimed at stopping anyone else from creating a competitive alternative," wrote Smith on the blog. We've therefore decided to join a large and growing number of companies registering their concerns about the European search market."

Smith added that Google holds about 95% of the European search market. In the U.S., Microsoft accounts for around a quarter of searches, either via its Bing technology or its partnership with

Yahoo!

(YHOO)

.

Microsoft's move, however, had little impact on Google's shares on Thursday. The company's stock crept up 0.95%, to $587.35, despite a modest slip in tech stocks that saw the Nasdaq lost 0.28%. Shares of Microsoft were down 14 cents, or 0.55%, to $25.47.

--Written by James Rogers in New York.

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