Microsoft's global major crash! What happened?

According to CCTV News, on July 19th local time, some applications and services under Microsoft experienced access delays, incomplete functions, or inability to access. It is reported that the train location information of West Japan Railway Company (JR West) could not be obtained due to a Windows system failure, affecting Australian airlines, banks, government networks, enterprises, supermarket self-checkout machines, and more. Currently, Microsoft in the United States is investigating the cause of the issue and seeking a solution.

Updating