Microsoft has been given 20-days by Chinese authorities to better-explain its sales strategy for its Windows and Office products in China.
Microsoft has been accused of violating China's anti-monopoly laws for its Windows operating system and Office software.
The investigation was launched last year after complaints by companies that Microsoft used tie-in sales and verification codes in its Windows operating system and Microsoft Office software programs.
Chinese authorities contend this violates Chinese law.
US chip designer Qualcomm and German automaker Mercedes-Benz are also facing similar anti-monopoly investigations.
