Edit the registry using the command prompt

To know the contents of a particular registry key or a particular value:

REG QUERY KeyName [/v ValueName | /ve] [/s]

/v Specifies the registry value name that is to be queried.

/ve Runs a query for value names that are empty.

/s Specifies to query all subkeys and value names recursively. Example to query the value of menushowdelay at HKCU/control panel/desktop

reg query "hkcu/control panel/desktop" /v menushowdelay

To add new registry keys:

REG ADD KeyName [/v ValueName | /ve][/t Type][/d Data] [/f]

/t Specifies the type for the registry entry which must be one of the following: REG_SZ REG_MULTI_SZ REG_DWORD_BIG_ENDIAN REG_DWORD REG_BINARY REG_DWORD_LITTLE_ENDIAN REG_LINK REG_FULL_RESOURCE_DESCRIPTOR REG_EXPAND_SZ

/d Specifies the data for the new registry entry.

/f Adds the registry entry without prompting for confirmation.

Example to change the value of menushowdelay to 0:
reg add "hkcu/control panel/desktop" /v menushowdelay /t REG_SZ /d 0

To delete registry keys:

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

/va Deletes all entries under the specified subkey. Subkeys under the specified subkey are not deleted.

to export and import registry keys:

To export: REG EXPORT KeyName FileName

To import: REG IMPORT FileName