A photo illustration shows the Microsoft logo displayed on a Nokia phone in Vienna in this file photo taken September 3, 2013.  [Photo/Agencies]

The Chinese antitrust regulator confirmed on Tuesday that it is launching an anti-monopoly investigating concerning Microsoft Corp's Windows operating system and Office business software.

The State Administration for Industry and Commerce (SAIC) said in a statement the US company's two iconic products may encounter compatibility and file verification issues because Microsoft did not disclose enough product information. Microsoft is also facing tied-in sale investigations, the SAIC said.

Microsoft did not immediately respond to the SAIC's announcement.

On Monday, SAIC officials visited Microsoft's offices in nine Chinese cities, including Beijing, Shanghai and Chengdu.

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