Companies that don't pass the checks will no longer be allowed to supply their products and services in China, Xinhua cited the State Internet Information Office as saying. Products that don't meet security requirements will be banned.
The likely consequences of the ruling were not immediately clear but it comes amid a heated dispute with the United States which Chinese media labelled a "high-level hooligan" on Wednesday in response to Washington charging five Chinese military officers with hacking U.S. companies to steal trade secrets.
This was done because of security concerns around Windows 8, which exposes computers to monitoring and the risk of being controlled remotely, the Communist Party mouthpiece People's Daily newspaper reported on Thursday, citing a U.S. National Security Agency programme called Prism.
Windows 8 was also not user-friendly, the People's Daily added.
Xinhua said the investigations would check product security and seek to prevent suppliers from illegally gathering, storing or processing user data.
"For a long time, governments and enterprises of a few countries have gathered sensitive information on a large scale, taking advantage of their monopoly in the market and technological edge," Xinhua quoted Jiang Jun, spokesman for the State Council Information Office, as saying.
"They not only seriously undermine interests of their clients but also threaten cyber security of other countries."
A small number of governments and businesses "take advantage of technological monopolies to collect sensitive data on a large scale" from the Chinese government, business and institutions, Xinhua added, saying there had been extensive wiretapping and security breaches.
Documents leaked by former U.S. security contractor Edward Snowden "rang alarm bells" over cyber security, Jiang added.
Xinhua did not give details of which governments or businesses it was referring to but U.S. security standards for information technology were not transparent or clear-cut, Xinhua added.
China has also targeted other foreign tech firms in recent months, including Qualcomm Inc.. The anti-monopoly regulator accused the U.S. chip giant of overcharging and abusing its market position.
© Thomson Reuters 2014