how to backup the Typing history in windows

There is no .history file in Windows and it doesn't store in the registry.  Each CMD window has it's own copy in memory.

The closest you can get to a history list is through the DOSKEY .

Frequently used keys you can store in a file and have DOSKEY load them each time it starts.  The macro list won't interfer with the dynamically built history command list; your macro commands will always be available no matter how many commands you type in the CMD window.

C:\Documents and Settings\Administrator>doskey /?
Edits command lines, recalls Windows XP commands, and creates macros.
 
DOSKEY [/REINSTALL] [/LISTSIZE=size] [/MACROS[:ALL | :exename]]
  [/HISTORY] [/INSERT | /OVERSTRIKE] [/EXENAME=exename] [/MACROFILE=filename
  [macroname=[text]]
 
  /REINSTALL          Installs a new copy of Doskey.
  /LISTSIZE=size      Sets size of command history buffer.
  /MACROS             Displays all Doskey macros.
  /MACROS:ALL         Displays all Doskey macros for all executables which h
                      Doskey macros.
  /MACROS:exename     Displays all Doskey macros for the given executable.
  /HISTORY            Displays all commands stored in memory.
  /INSERT             Specifies that new text you type is inserted in old te
  /OVERSTRIKE         Specifies that new text overwrites old text.
  /EXENAME=exename    Specifies the executable.
  /MACROFILE=filename Specifies a file of macros to install.
  macroname           Specifies a name for a macro you create.
  text                Specifies commands you want to record.
 
UP and DOWN ARROWS recall commands; ESC clears command line; F7 displays
command history; ALT+F7 clears command history; F8 searches command
history; F9 selects a command by number; ALT+F10 clears macro definitions.
 
The following are some special codes in Doskey macro definitions:
$T     Command separator.  Allows multiple commands in a macro.
$1-$9  Batch parameters.  Equivalent to %1-%9 in batch programs.
$*     Symbol replaced by everything following macro name on command line.

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No, this is not what i want,  their is a file in windows, in docuemnts and settings section in the user profile that saves all email addresses and serch terms in a file, the problem is i can not remember the file name or extention ....

it is also related to windows auto complete

couldn't find it on my computer although i have my computer has all addresses and search terms stored somewhere

The actual file name is outlook.nk2 or <username>.nk2.  Make sure to unhide hidden files before searching.  

Go directly to the default location.