REG DELETE KeyName /v ValueName | /ve | /va /f KeyName \Machine\]FullKey Machine Name of remote machine - omitting defaults ...

REG DELETE KeyName [/v ValueName | /ve | /va] [/f]

  KeyName    [\\Machine\]FullKey
    Machine  Name of remote machine - omitting defaults to the current machine.
             Only HKLM and HKU are available on remote machines.
    FullKey  ROOTKEY\SubKey
    ROOTKEY  [ HKLM | HKCU | HKCR | HKU | HKCC ]
    SubKey   The full name of a registry key under the selected ROOTKEY.

  ValueName  The value name, under the selected Key, to delete.
             When omitted, all subkeys and values under the Key are deleted.

  /ve        delete the value of empty value name (Default).

  /va        delete all values under this key.

  /f         Forces the deletion without prompt.

Examples:

  REG DELETE HKLM\Software\MyCo\MyApp	imeout
    Deletes the registry key Timeout and its all subkeys and values

  REG DELETE \\ZODIAC\HKLM\Software\MyCo /v MTU
    Deletes the registry value MTU under MyCo on ZODIAC