reg delete
Deletes a subkey or entries from the registry. Windows commands reference
On Windows
Windows
reg delete <keyname> [{/v valuename | /ve | /va}] [/f]reg delete HKLM\Software\MyCo\MyApp\Timeoutreg delete \\ZODIAC\HKLM\Software\MyCo /v MTU
<keyname1>Specifies the full path of the subkey or entry to be deleted. To specify a remote computer, include the computer name (in the format \<computername>\) as part of the keyname. Omitting \<computername>\ causes the operation to default to the local computer. The keyname must include a valid root key. Valid root keys for the local computer are: HKLM, HKCU, HKCR, HKU, and HKCC. If a remote computer is specified, valid root keys are: HKLM and HKU. If the registry key name contains a space, enclose the key name in quotes./v <valuename>Deletes a specific entry under the subkey. If no entry is specified, then all entries and subkeys under the subkey will be deleted./veSpecifies that only entries that have no value will be deleted./vaDeletes all entries within the specified key. Subkey entries that reside within the specified key are not deleted./fDeletes the existing registry subkey or entry without asking for confirmation./?Displays help at the command prompt.