You can edit the Windows Registry with the help of Console Registry Tool or reg.exe. Reg.exe is a command-line utility with which you can perform almost all the task which you otherwise can with regedit.exe.
Reg.exe can be useful when you want to quickly make a change to the Windows Registry without opening registry editor and moreover and has the additional facility of being directly usable in scripts.
To run the reg.exe, open cmd, type reg /? and hit Enter. This will show you the parameter list, syntax & the return codes.
The reg commands include:
Reg add
Reg delete
Reg compare
Reg copy
Reg export
Reg import
Reg load
Reg query
Reg restore
Reg save
Reg unload.
For instance:
To add a new subkey or entry to the registry use:
reg add <KeyName> [{/v ValueName | /ve}] [/t DataType] [/s Separator] [/d Data] [/f]
Examples:
To add the key HKLM\Software\MyCo on remote computer ABC, type:
REG ADD \\ABC\HKLM\Software\MyCo
To add a registry entry to HKLM\Software\MyCo with a value named Data of type REG_BINARY and data of fe340ead, type:
REG ADD HKLM\Software\MyCo /v Data /t REG_BINARY /d fe340ead
To add a multivalued registry entry to HKLM\Software\MyCo with a value name of MRU of type REG_MULTI_SZ and data of fax\0mail\0\0, type:
REG ADD HKLM\Software\MyCo /v MRU /t REG_MULTI_SZ /d fax\0mail\0\0
To add an expanded registry entry to HKLM\Software\MyCo with a value name of Path of type REG_EXPAND_SZ and data of %systemroot%, type:
REG ADD HKLM\Software\MyCo /v Path /t REG_EXPAND_SZ /d ^%systemroot^%
To delete a subkey or entries from the registry use:
Reg delete <KeyName> [{/v ValueName | /ve | /va}] [/f]
Examples:
To delete the registry key Timeout and its all subkeys and values, type:
REG DELETE HKLM\Software\MyCo\MyApp\Timeout
To delete the registry value MTU under HKLM\Software\MyCo on the computer named ZODIAC, type:
REG DELETE \\ZODIAC\HKLM\Software\MyCo /v MTU
For a full read & details visit Microsoft Technet.
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