query keyname [/v valuename | /ve] [/s]

Displays the data stored in a Registry value; omit /v valuename to display list of all the values in keyname (include /s to query all subkeys), or specify /ve to query the (Default) value. Keyname can also include the name of a remote computer, like this: query computer keyname.

add keyname [/v valuename | /ve] [/d data ] [/t typ ] [/s sep ] [/f]

Adds a new value. The keyname, valuename, /v, and /ve options are the same as with query, listed previously. The /d option assigns data to the new value; if omitted, the new value will be empty. Use /t to specify the data type for the value; the default is string (REG_SZ). Specify /f to overwrite existing values without prompting.

delete keyname [/v valuename | /ve | /va] [/f]

Deletes an existing value. All options are the same as with add, above. The /va parameter instructs the Registry Console Utility to delete all values in the specified key.

copy keyname1 keyname2 [/s] [/f]

Duplicates a key and all its values, where keyname1 is the full path of the source key, and keyname2 is the full path of the new key. Specify /s to include all subkeys and their values, and use the /f option to skip the prompt.

save keyname filename

Saves a portion of the registry, keyname, into a binary hive file, filename. The root key in keyname must be a four-letter abbreviation (e.g., HKLM, HKCU, HKCR, HKU, HKCC). Use export to create a registry patch (.reg) file. See also restore.

restore keyname filename

Imports keyname from a hive file (created with save, listed previously) into the Registry. As with save, you must use the four-letter root key abbreviation.

load keyname filename

Mounts a hive file (created with save, above) onto the Registry. Load is similar to restore, above, except changes to the keys are subsequently written back to the source hive file.

unload keyname

Unmounts a key, keyname, that has been installed with load, above.

compare keyname1 keyname2 [/v valuename | /ve] [/s] [ output ]

Compares two keys or values, keyname1 and keyname2. The /v, /ve, and /s options are the same as with add, listed earlier. Output can be /oa (output all differences and matches), /od (output only differences, the default), /os (output only matches), or /on (no output).

export keyname filename

Creates a registry patch (.reg), filename, from keyname. Registry patches can be imported with import, below, or by double-clicking in Explorer (via Registry Editor).

import filename

Imports a registry patch (.reg), filename, created either with export, listed earlier, or with the Registry Editor.