Windows error 1016 (ERROR_REGISTRY_IO

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: an unrecoverable I/O failure blocked registry file read, write, or flush.

Previous	Next
ERROR_REGISTRY_CORRUPT	ERROR_NOT_REGISTRY_FILE

ERROR_REGISTRY_IO_FAILED

Registry file I/O failed unrecoverably

The registry persists hive data through files and supporting recovery data. ERROR_REGISTRY_IO_FAILED identifies a storage-path failure while Windows was reading, writing, or flushing registry state. It is not equivalent to a malformed key or an access-control denial.

Start with the volume and device path that stores the affected hive. Correlate disk, controller, file-system, filter-driver, and power events with the registry failure. RegFlushKey forces registry data for a key back to disk and is intentionally expensive; an application that calls it excessively can amplify I/O pressure, although the error still indicates the registry operation could not complete. If only one restored or externally supplied hive fails, validate that file separately; if system hives fail together, investigate storage reliability before modifying registry content.

What to inspect

Correlate the timestamp with disk, controller, file-system, and reset events.
Identify whether one hive or several system hives are affected.
Review application use of forced flush operations and preserve the failing files.

References

Looking for a different code? Search another status or error code.