A version of Windows 10 that is customised for use in China has been developed by a company known as C&M Information Technologies, a joint venture between the state-owned China Electronics Technology Group and Microsoft.
It aims to overcome the hurdle that has prevented Windows from being used widely in China: fears that there may be hidden backdoors which enable snooping on behalf of the US Government, Dow Jones reported.
CETC owns 51% of C&M Information and Microsoft the balance. Other US companies like Qualcomm and Intel have created similar entities with the same motive: doing business in China.
IBM recently announced a venture with Chinese conglomerate Wanda Group to provide cloud computing services.
{loadposition sam08}Alain Crozier, chief executive of Microsoft Greater China, told the China Daily: "We have already developed the first version of the Windows 10 government secure system. It has been tested by three large enterprise customers.
"We have worked extensively to make it secure and controllable. We are now ready to serve the market,"
The Windows 10 version for China has yet to be certified for use and only after that will it find its way to the list of software approved for use by government agencies.
Disclosures of blanket US spying by the ex-NSA contractor Edward Snowden in 2013 led to Beijing removing Microsoft's newer products from government procurement lists.
An anti-trust probe into Microsoft's China dealings is still being pursued by China's State Administration for Industry and Commerce.
Windows 10 has only a 9% share of PCs in China, according to figures from Baidu in February. Globally, Windows 10 had about 25% at the same time, data from Net Applications showed.