In a cryptic statement, Chinese government regulators today demanded that Microsoft explain “major issues” in data authorities collected from the company last year during an antitrust investigation.

It was the first time in more than a year that China’s State Administration for Industry and Commerce (SAIC) hinted that its probe is continuing.

China’s investigation into Microsoft began in August 2014 with raids on Microsoft offices in Beijing, Chengdu, Guangzhou and Shanghai.. At the time, SAIC — one of several agencies in the People’s Republic of China (PRC) that enforce antitrust law — said it was after information about how Windows and Microsoft Office were bundled, about Windows-Office compatibility, and about other unnamed concerns after fielding complaints since mid-2013.

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