Tools
Activation error codes
An error code only says which layer failed. Each entry includes the official message, where it applies, and the first check to run.
24 checked entriesWindows / OfficeChecked 2026-10-20
About this data
All 24 entries come from public Microsoft Learn and Microsoft Support documents. Each one cites its sources and the date it was checked (2026-10-20). A code with no basis in those documents is not listed, and this site does not invent a meaning.