Regulator queries Microsoft in monopoly investigation

US technology giant Microsoft Corp has been asked by the Chinese government to clarify "major issues" regarding a monopoly case, officials said on Tuesday.

The State Administration for Industry and Commerce, one of the government agencies that deals with the Anti-monopoly Law, said the charges against Microsoft were over its Windows operating system and the Office suite of programs.

On Tuesday, the SAIC asked Microsoft to clarify on some problems it had found in electronic data during investigations.