Win10 Build 10130 Small box appears during installation: Can someone understand?

Earlier yesterday, Microsoft officially launched the Build 10130 update to the Windows 10 Technology Preview in the "Fast Ring" mode. Any software will inevitably have some bugs during the test, especially the Chinese version of the program developed by foreigners, more or less will have "God Translation" to make everyone happy.

After a few hours of experience, the author found that the Build 10130 version can be said to be very stable. Before the taskbar crashed, input Karton and so on, there was almost no such situation in this version, it is worth everyone to upgrade. Experience.

Unfortunately, the Build 10130 version is not so powerful during the installation process. In the author's impression, Build 10130 upgrade takes longer than any previous version, especially when it is restarted, it is stuck in “0%” for a long time, it is easy to make people think that the system has crashed.

In the installation process, in addition to the words "Windows is being installed", the rest of the fonts have become small boxes, even the God translation is not.

Does anyone know the meaning of these small boxes?