Microsoft has just announced that the National Security Agency (NSA) has included the Windows 10 system and the Surface series of tablets in the "Confidential" list. The Surface computer is the only Windows 10 device to enter the NSA list. Microsoft claims that this proves its hardware and The software configuration has the highest security, which NSA can prove. The entry into the list of classified uses is a great victory for Microsoft, which means that Microsoft can sign various contracts with the U.S. government later, including the Surface series of tablet computers in various government departments in the United States. Microsoft attaches great importance to the contract signed with the U.S. government. Recently, Microsoft also signed a contract with the U.S. Department of Defense to install the Windows 10 system on the Ministry of Defense’s 4 million devices. At the same time, Microsoft also cooperates with other organizations around the world and hopes to continue to promote its latest operating system. The decision of the NSA may cause the installation rate of the Windows 10 system to increase more.