Delete keys or their values from the registry.

:: To delete a specific registry key:
reg delete <key_name>

:: To delete a value under a specific key:
reg delete <key_name> /v <value>

:: To delete all values recursively under the specified key:
reg delete <key_name> /va

:: To forcefully delete all values recursively under a key without a prompt:
reg delete <key_name> /f /va