An amendment to the Defense Dept. spending bill prohibits funding for installation of security vulnerabilities in US-made tech equipment.
Chinese state-run TV calls Windows 8 a security threat, but Microsoft denies allegations that it uses its OS to collect data from users.
Revelations in new document leaked by Edward Snowden appear to be at odds with privacy assurances from President Obama and other officials.
Developers working on Replicant, an open-source OS based on Android, claim to find a flaw that provides access "to read, write, and delete files" stored on some Samsung devices.
Apple, Microsoft, Yahoo, Facebook, and other large tech companies let the National Security Agency search through confidential customer data, according to the Washington Post.
The Japanese messaging app Line may be blocked in China, but it's still raking in cash from merchandise based on its cartoon characters at a huge mall in Beijing.
The iPad and MacBook are apparently no longer on a list of products approved for government use due to security concerns, Bloomberg reports.
The country's State Administration for Industry and Commerce has not charged Microsoft with obstructing its probe but says the company needs to tread carefully.
Chinese media reports suggest the investigation could focus on Microsoft's "de facto monopoly" in China's OS market.
The company is among a number of tech giants facing rocky relations with the Chinese government.