Question

Is it possible to modify a registry value (whether string or DWORD) via a .bat/.cmd script?

Answer 1

You can use the REG command. From http://www.ss64.com/nt/reg.html:

Syntax:     REG QUERY [ROOT\]RegKey /v ValueName [/s]    REG QUERY [ROOT\]RegKey /ve  --This returns the (default) value     REG ADD [ROOT\]RegKey /v ValueName [/t DataType] [/S Separator] [/d Data] [/f]    REG ADD [ROOT\]RegKey /ve [/d Data] [/f]  -- Set the (default) value     REG DELETE [ROOT\]RegKey /v ValueName [/f]    REG DELETE [ROOT\]RegKey /ve [/f]  -- Remove the (default) value    REG DELETE [ROOT\]RegKey /va [/f]  -- Delete all values under this key     REG COPY  [\\SourceMachine\][ROOT\]RegKey [\\DestMachine\][ROOT\]RegKey     REG EXPORT [ROOT\]RegKey FileName.reg    REG IMPORT FileName.reg    REG SAVE [ROOT\]RegKey FileName.hiv    REG RESTORE \\MachineName\[ROOT]\KeyName FileName.hiv     REG LOAD FileName KeyName    REG UNLOAD KeyName     REG COMPARE [ROOT\]RegKey [ROOT\]RegKey [/v ValueName] [Output] [/s]    REG COMPARE [ROOT\]RegKey [ROOT\]RegKey [/ve] [Output] [/s]  Key:    ROOT :          HKLM = HKey_Local_machine (default)          HKCU = HKey_current_user          HKU  = HKey_users          HKCR = HKey_classes_root     ValueName : The value, under the selected RegKey, to edit.                (default is all keys and values)     /d Data   : The actual data to store as a 'String', integer etc     /f        : Force an update without prompting 'Value exists, overwrite Y/N'     \\Machine : Name of remote machine - omitting defaults to current machine.                 Only HKLM and HKU are available on remote machines.     FileName  : The filename to save or restore a registry hive.     KeyName   : A key name to load a hive file into. (Creating a new key)     /S        : Query all subkeys and values.     /S Separator : Character to use as the separator in REG_MULTI_SZ values                   the default is '\0'      /t DataType  : REG_SZ (default) | REG_DWORD | REG_EXPAND_SZ | REG_MULTI_SZ     Output    : /od (only differences) /os (only matches) /oa (all) /on (no output)