Why can't my downloaded Windows 8 system be activated?

The key is used by too many people, so it is invalid.

But don't underestimate our "China speed". The win8 rtm pro you mentioned already has a GHOST version. The fastest is the Twelve Constellation Studio, Baidu's "Ghost of Twelve Constellations", downloading the latest 32-bit professional version, and the older RP, all of which are automatically activated. Please rest assured that the system is very stable and there is no streamlining. Automatic installation, no tutorial!